Important Body Fluids And Circulation Questions for CBSE Class 11th

Match the items given in column I with those in column II and select the correct option. Column I Column II a. Monocytes i. Formed from megakaryocytes b. Platelets ii. Polymorphonuclear leucocytes c. Basophils iii. Mononuclear phagocytes d. Neutrophils iv. Functionally similar to Mast cells

The enzyme thrombokinase helps in the conversion of

The QRS complex in a standard ECG represents :

Unlike tricuspid valve, pulmonary semilunar valve

What is the stroke volume of a person whose heart rate is 60 beats per minute and cardiac output is 5.4 litres per minute?

Individuals with AB + blood type are called ‘universal recipients’ because

The doctors use a stethoscope to listen to heart sounds. The second heart sound (dub) is heard when the

A blood clot, or coagulum is formed mainly of a network of threads of

Serum is blood without

Rh incompatibility may arise when

The duration of the atrial diastole is

A person with A blood type can receive blood from a donor with

The number of papillary muscles in the left ventricle is

The isoelectric portion of the ECG during which the ventricles are completely depolarised is

The plasma protein involved in osmotic balance is

Neither A antigen nor B antigen is present on the RBC in persons of

In a normal healthy person, how much amount of blood is pumped out from each ventricle in one minute on an average?

Select the correct statement regarding the tricuspid valve.

Serum is plasma without

Plasma proteins constitute per cent of blood plasma.

Which of the following converts fibrinogen to fibrin?

The precursors of platelets are

Which of the following is not necessary for blood clotting?

The figure shows blood circulation in humans with labels A to D. Select the option which gives correct identification of label and functions of the part.

Which one of the following is correct?

Blood pressure in the mammalian aorta is maximum during

The P wave in a standard ECG represents

Which of the following do you expect to be present in blood coagulum but not in the blood?

During cardiac cycle, aortic semilunar valve closes when

Which of the following options correctly represents the heart conditions in heart failure and heart attack, respectively?

A specialised nodal tissue embedded in the lower corner of the right atrium, close to Atrio-ventricular septum, delays the spreading of impulses to heart apex for about 0.1 sec. The delay allows

During an exercise, the stroke volume of an athlete is 120 mL/beat and the heart rate is 100 beats/minute. The cardiac output during the exercise is

The cardiovascular centre which regulates the heart rate and stroke volume is located in the

ABO blood grouping is based on the presence or absence of

On a standard ECG, T wave represents

The first heart sound (lub) is produced when

Identify the correct pathway for conduction of action potentials in the heart

Select the correct option regarding the state of heart valves during ventricular ejection.

Match the items given in column I with those in column II and select the correct option. Column I Column II (a) Arthropods (i) Complete double circulation (b) Amphibians (ii) Open circulatory system (c) Birds (iii) Incomplete double circulation (d) Fishes (iv) Single circulation

Which of the following ions play a very important role in blood clotting?

Which of the following represents normal blood pressure (in mm Hg)?

Which of the following have a closed circulatory system?

If mitral valve suddenly becomes non-functional, what will be the immediate effect?

Select the correct match.

Select the incorrect statement about erythrocytes.

Normally, blood plasma does not contain

Incomplete double circulation occurs in

Which of the following can generate maximum number of action potentials per minute?

Match column I with column II and select the correct option using the codes given below. Column I Column II (a) Bicuspid valve (i) In the walls of ventricles (b) Tricuspid valve (ii) Between left ventricle and aorta (c) Semilunar valve (iii) Between right atrium and right ventricle (d) Purkinje fibres (iv) Between left atrium and left ventricle

Which one of the following is true about atrial systole?

Human RBC live only for about 120 days. Which of the following statement(s) is/are most appropriate explanation for this feature? (a) Their plasma membranes undergo wear and tear as they squeeze through blood capillaries. (b) They respire anaerobically because they lack mitochondria. (c) They cannot synthesize new components to replace damaged ones because they lack a nucleus and other organelles. (d) They contain a very high concentration of the enzyme carbonic anhydrase.

Select the correct combination. Blood type Antigens on RBC Antibodies in plasma 1. A A Anti-A 2. AB A, B Anti-A and Anti-B 3. B B Anti-B 4. O None Anti-A and Anti-B

Select the wrong statement about Rh blood grouping.

Match the items in column I with those in column II and choose the correct option. Column-I Column-II (a) P wave (i) Ventricular depolarisation (b) QRS complex (ii) Ventricular repolarisation (c) T wave (iii) Isoelectric period (d) S-T segment (iv) Atrial depolarisation (a) (b) (c) (d) 1. iii iv i ii 2. iv ii i iii 3. iv i ii iii 4. iv iii i ii

Match column I with column II and select the correct option. Column-I Column-II (a) Bicuspid valve (i) In the walls of ventricles (b) Tricuspid valves (ii) Between left ventricle and aorta (c) Semilunar valve (iii) Between right atrium and right ventricle (d) Purkinje fibres (iv) Between left atrium and left ventricle a b c d 1. iii i iv ii 2. iv iii ii i 3. iv i iii ii 4. iv i ii iii

Select the incorrect statement from the following.

Blood coagulation is initiated by certain factors released by the

Individuals with which blood type are called ‘universal recipients’?

The rate of heartbeat, speed of conduction of action potential and thereby the cardiac output decreases due to signals from the

What is the function of thrombin in the process of blood clotting?

Which of the following is a correct feature of the human circulatory system?

In adult humans, erythropoiesis occurs in

A clot, or coagulam is formed mainly of

The percent of blood occupied by plasma is

Select the incorrect statement about the circulatory system of birds and mammals.

Read the statements. A. Erythroblastosis foetalis is due to incompatibility between Rh -ve mother and Rh +ve foetus. B. Rh antibodies occur naturally in the plasma of Rh -ve persons.

Which of the following has the highest concentration of oxygen?

Oxygenated blood from the lungs enters

An artificial pacemaker is commonly implanted to treat

All of the following are exclusive features of capillaries compared to other blood vessels except

Granulocytes that secrete an anticoagulant are

A chronic condition in which the heart doesn’t pump blood effectively to meet the needs of the body is termed

The liver receives

From a reading of ECG, how can one determine the heart beat rate of an individual?

Tunica media of blood vessels is made up of

Tunica intima is made of

Which of the following is the function of the least abundant leucocytes?

The exchange of substances between the tissue and blood vessels takes place only at the

In the human heart, SAN is located is near the opening of

Vitamin that helps in maturation of RBCs is

In certain clotting disorders, excessive loss of blood occurs, even in case of minor cut. This is due to a reduction in the number of

Mark the correct statement about WBCs.

In addition to ABO group, Rh group should also be matched before transfusions because

Sympathetic neural signals

Which of the following statements is incorrect ?

Given below are four statements (i-iv) regarding human blood circulatory system. I. Arteries are thick-walled and have narrow lumen as compared to veins. II. Angina is acute chest pain when the blood circulation to the heart is increased. III. Persons with blood group AB can donate blood to any person with any blood group under ABO system. IV. Calcium ions play a very important role in blood clotting. Which two of the above statements are correct?

Ventricle pumps mixed blood (oxygenated and deoxygenated) in

Mark the correct one.

Which one of the following is correct for the mitral valve of the human heart?

Read the following statements (A – D) (A) QRS complex ECG indicates ventricular depolarization. (B) The electrocardiograph machine is used to obtain Electrocardiogram (ECG) on graph paper. (C) During a cardiac cycle, the left ventricle pumps out about 70 ml of oxygenated blood which is called the cardiac output. (D) The second heart sound is associated with closure of the semilunar valves. How many statements from the above is / are incorrect ?

Which of the following statement is incorrect of ECG of human heart?

Megakaryocytes

Match the items in column I with those in column II and choose the correct option from the codes given below. Column-I Column-II a Albumins i Blood clotting b Globulins ii Inflammation c Fibrinogens iii Defence mechanism d Histamine iv Osmotic pressure a b c d 1. iii iv i ii 2. iv iii ii i 3. iv i iii ii 4. iv iii i ii

Select the correct event in the blood clotting cascade.

The normal RBC count in a healthy male human being is

Which of the following substances are not normally present in the blood but present in a blood clot?

Rh group should also be matched before blood transfusions because

The figure shows a human blood cell. Identify it and give its characteristics

The diagram given here is the standard ECG of a normal person. The P-wave represents the

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?

Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when

Person with blood group AB is considered as universal recipient because he has

How do parasympathetic neural signals affect the working of the heart?

In mammals, which blood vessel would normally carry largest amount of urea?

Blood pressure in the pulmonary artery is

Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.

Serum differs from blood in

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? (1) They do not need to reproduce. (2) They are somatic cells. (3) They do not metabolise. (4) All their internal space is available for oxygen transport.

The hepatic portal vein drains blood to liver from

Match the Column – I with Column – II. Column-I Column-II (a) P-wave (i) Depolarisation of ventricles (b) QRS complex (ii) Repolarisation of ventricles (c) T-wave (iii) Coronary ischemia (d) Reduction in the size of T- wave (iv) Depolarisation of atria (v) Repolarisation of atria Select the correct option.

What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricula r systole is 50 mL?

The normal blood pressure in human beings is

HDNB can be prevented by administering

Match the items given in column I with those in column II and select the correct option given below. Column I Column II A. Fibrinogen (i) Osmotic balance B. Globulin (ii) Blood clotting C. Albumin (iii) Defence mechanism

Match the following columns and select the correct option. Column I Column II (a) Eosinophils (i) Immune response (b) Basophils (ii) Phagocytosis (c) Neutrophils (iii) Releases histaminase, destructive enzymes (d) Lymphocytes (iv) Releases granules containing histamine

Which of the following is associated with decrease in cardiac output?

Which of the following conditions cause erythroblastosis foetalis?

The differential blood cell count of a person suffering from allergic reactions is more likely to reveal elevated numbers of

Match the items given in Column I with those in Column II and select the correct option given below: Column I Column II a. P wave i. Heart rate b. QRS complex ii. Atrial depolarisation c. T wave iii. Ventricular depolarisation d. Number of QRS complexes iv. Ventricular repolarisation

Which of the following heart valve has only two cusps?

Which of the following cardiac events occur during ventricular systole? a. Opening of bicuspid and tricuspid valves b. Closure of bicuspid and tricuspid valves c. Opening of semilunar valves d. Closure of semilunar valves e. Lubb sound f. Dupp sound

All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?

All the components of the conducting system can generate an action potential for the contraction of heart muscle, but the sino-atrial node acts as the pacemaker because:

In the heart, as the action potential reaches the AV node from the SA node, there is a delay of the action potential. This delay is important because :

During the cardiac cycle, the major part of ventricular filling occurs during

Normal blood pressure in an adult male is represented as 120/80. In this, 120 represents the blood pressure in the aorta during the

Angina pectoris is a/an

Which WBCs secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions?

The normal WBC count in an adult human being is

Normal activities of the heart are regulated by

Select the incorrect statement from the following.

What would be the cardiac output of a person if the blood volume in each ventricle is 120 mL at the end of diastole and 50 mL at the end of systole and the heart rate is 60 beats per minute?

Select the correct statement about blood vessels.

A person with ‘B’ type blood has

Anti-Rh antibodies can develop in an

A special system of blood vessels which circulates blood to and from the cardiac musculature is

The hepatic portal vein drains blood from the

Blood coagulation is initiated by certain factors released by the

Sympathetic neural signals

An elaborate network of vessels that collects interstitial fluid and drains it back to the major veins is

The rate of heartbeat, speed of conduction of action potential and thereby the cardiac output decreases due to signals from the

In which one of the following animals, the blood passes through the heart only once in each complete circuit?

Which of the following are provided with semilunar valves?

Which of the following options correctly represents the heart conditions in heart failure and heart attack, respectively?

A fall in blood levels of albumin is most likely to affect

Individuals with which blood type are called ‘universal recipients’?

Suresh has circulating anti-B but not anti-A antibodies. In case of emergency, he can receive blood from a donor whose blood type is

Select the correct match.

If B + ve blood is transfused to an O + ve patient accidentally, what might happen?

Which of the following transfusions would carry the least risk?

Haemolytic disease of the foetus and newborn (erythroblastosis foetalis) can be prevented by administering

Select the correct combination.

Sino-atrial node (SAN) is present in the

The hepatic portal vein drains blood from the

Which of the following cannot coagulate?

All the arteries carry

In human, which blood vessel would normally carry blood with high concentration of glucose?

Select the correct match.

Serum is plasma without

The normal RBC count in a healthy male human being is

Mature erythrocytes in humans cannot respire aerobically. Which of the following is the most appropriate explanation for this feature?

Which of the following is often called the “graveyard of RBCs”?

The average lifespan of RBC in human blood is

Which WBCs secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions?

The following figure shows a human blood cell. Select the option that identifies it and gives its characteristics.

The following figure shows a human blood cell. Select the option that identifies it correctly and gives its characteristics.

Every 100 mL of blood of a healthy individual has

Select the correct statement about blood platelets.

A person with ‘B’ type blood has

Anti-Rh antibodies can develop in an

A blood clot, or coagulum is formed mainly of a network of threads of

The enzyme complex that activates prothrombin to thrombin is

Which of the following is not necessary for blood clotting?

Which of the following have a closed circulatory system?

Select the correct combination. Animal Heart Circulation 1. Fish Three-chambered Single circulation 2. Frog Three-chambered Incomplete double circulation 3. Crocodile Three-chambered Incomplete double circulation 4. Pigeon Four Single circulation

Incomplete double circulation occurs in

The first heart sound (lub) is produced when

What is the stroke volume of a person whose heart rate is 60 beats per minute and cardiac output is 5.4 litres per minute?

Diabetes mellitus increases the risk of atherosclerosis, which is

Which of the following options correctly represents the heart conditions in heart failure and heart attack, respectively? Heart failure Heart attack 1. The heart stops beating Heart muscle is suddenly damaged by an inadequate blood supply 2. The heart is not pumping blood effectively The heart stops beating 3. The heart is not pumping blood effectively Heart muscle is suddenly damaged by an inadequate blood supply 4. Acute chest pain when not enough oxygen is reaching the heart muscle The heart stops beating

In an ECG, there is no distinctly visible wave representing

Plasma proteins constitute per cent of blood plasma.

Select the incorrect statement about erythrocytes.

The precursors of platelets are

Platelets are produced in the

Rh group should also be matched before blood transfusions because

Select the correct event in the blood clotting cascade.

Which of the following converts fibrinogen to fibrin?

ECG is a graphical representation of the

Select the correct pathway of systemic circulation.

AV node is located in the

If the heart beats 80 times per minute, the duration of the cardiac cycle is

During atrial systole,

All the arteries

The wall of a blood capillary is composed of

Which of the following has the lowest blood pressure?

The blood velocity is the slowest in

During exercise, cardiac output is increased by

Blood pressure is measured using

Mean arterial pressure =

A couple had a perfectly normal first baby. But, the second baby is still born and the doctors explained that the mother’s own antibodies killed the child. May be this condition is

Match the items given in column I with those in column II and select the correct option. Column I Column II (a) Erythrocytes (i) Transport of oxygen (b) Plasma (ii) Transport of hormones (c) Platelets (iii) Blood coagulation (d) Leucocytes (iv) Defence and immunity

Match the items given in column I with those in column II and select the correct option. Column I Column II (a) QRS complex (i) Ventricular repolarisation (b) T wave (ii) Duration of the cardiac cycle (c) P wave (iii) Atrial depolarisation (d) R-R interval (iv) Ventricular depolarisation

John has a blood pressure of 120/90 mm Hg. Mark the correct statement with regard to interpretation of this.

About 30 per cent of ventricular filling occurs during

Globulins in the blood plasma are primarily involved in

Blood clotting disorder leading to excessive loss of blood from the body occurs due to a reduction in the number of

Fibrinogen is converted into fibrin by

During the S-T segment of ECG,

Clotting disorders which lead to excessive loss of blood from the body occur due to a reduction in the number of

Old RBCs are phagocytosed in the

Simple squamous epithelium constitutes

Thrombin is an enzyme that acts on the substrate

Striated and involuntary muscles are present in the

90-92% of plasma is comprised of

Sympathetic nerves

Which chamber of human heart receives oxygenated blood from the lungs?

The function of erythrocytes is

Arteries that supply blood to the cardiac muscles are

Semilunar vales are present between

Pulmonary artery carries

In fishes, the blood that passes through the heart is

Mark the wrong statement about thrombin.

Antibodies are secreted by plasma cells, which are the descendants of

Smoking most commonly leads to which of the following heart diseases?

Match the following and choose the correct option. Column I Column II (a) Basophils (i) Release antibodies (b) Neutrophils (ii) Release histaminase (c) Eosinophils (iii) Release histamin (d) Lymphocytes (iv) Phagocytosis

Fibrinogen is a plasma protein that plays in important role in

Plasma constitutes nearly per cent of blood.

per cent of blood plasma is water.

Albumins help in

In adults, RBCs are formed in the

No. of RBC per mm 3 of blood in a healthy man is

The amount of haemoglobin in every 100 ml of blood in a healthy individual is

Formed elements constitute nearly per cent of the blood.

In human beings, RBCs have an average life span of

Which of the following is known as “the grave yard of RBCs”?

The most abundant leucocytes are

The agranulocytic leucocytes are

No. of WBC per mm 3 of blood in a healthy man is

The granulocytic leucocytes are

Among leucocytes, neutrophils are

The least numerous leucocytes are

Among leucocytes, eosinophils are

Clotting disorders, which will lead to excessive loss of blood from the body, occur due to

Special cells in the bone marrow from which platelets are formed are

group individuals are called ‘universal donors’.

WBC that secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions are

Among leucocytes, lymphocytes are

Phagocytic WBC which destroy foreign organisms entering the body are

Lymphocytes are responsible for

Among leucocytes, basophils are

resist infections and are also associated with allergic reactions.

Among leucocytes, monocytes are

group individuals are called ‘universal recipients.

Nearly per cent of humans are Rh positive.

A blood clot consists of formed elements trapped in a network of threads of

Erythroblastosis foetalis occurs due to the leakage of

A special case of Rh incompatibility has been observed between the

Thrombokinase converts

ions play an important role in blood clotting.

Erythroblastosis foetalis be avoided by administering

Which of the following is an example of an enzymatic cascade?

Fibrinogen is converted into fibrin by

The human heart is protected by

The human heart is derived from

Ventricle pumps out mixed blood in

Select the incorrect match.

The largest chamber in the human heart is

Select the wrong statement.

Atrio-ventricular node is present in the

Sino-atrial node is present in the

How is the nodal musculature different from the normal cardiac musculature?

Mitral valve prevents the flow of blood from

Tricuspid valve allows the flow of blood from

Select the correct pathway of conduction of action potentials in the human heart.

The can generate the maximum number of action potentials per minute.

During early ventricular systole (isovolumetric contraction),

Just before atrial systole,

The pacemaker of the human heart is

Atrial systole increases the flow of blood into the ventricles by about

The stroke volume of the human heart is approximately

During ventricular systole, ventricular ejection begins as the

The cardiac output can be defined as the volume of blood pumped out by

During early ventricular diastole (isovolumetric relaxation),

The normal duration of a cardiac cycle is about

Select the correct sequence of stages in the cardiac cycle.

In adults, RBCs are formed primarily in the

The first heart sound (lub) is associated with the

The cardiac output of a healthy individual is about

Compared to a normal individual, an athlete (at rest) has

The second heart sound (dub) is associated with the

The ECG machine makes the sound “… pip… pip… pip….. peeeeeeeeeeeeeeeeeeeeee” as the patient goes into

P wave in ECG represents

ECG is a graphical representation of the

The ventricular systole starts

QRS complex in ECG represents

T wave in ECG represents

For a detailed evaluation of the heart’s function, multiple ECG leads are attached to the

To obtain a standard ECG, a patient is connected to the machine with three electrical leads, except at

The end of the T wave marks the

By counting the number of QRS complex we can determine the

Which of the following represents the return of the ventricles from excited to normal state?

ECGs obtained from different individuals have

The basic number of layers in the wall of an artery or a vein is

The layers in the wall of an artery or a vein (from outside to inside) are

The inner lining of a blood vessel is made up of

Systemic circulation does not include

The fibrous connective tissue layer of a blood vessel with collagen fibres is

Which of the following is not a part of pulmonary circulation?

Tunica media of a blood vessel is made up of

Hepatic portal system is a unique vascular connection between the

Parasympathetic neural signals

Cardiac function is regulated by a special neural centre in the

The human heart is called myogenic because its normal activities are

Coronary system serves for the circulation of blood to and from

Sympathetic neural signals

Cardiac output is increased by

The normal systolic (pumping) blood pressure of man is

High blood pressure mainly affects

Coronary artery disease is often referred to as

Deposits of calcium, fat, cholesterol and fibrous tissues in the coronary arteries causes

The sudden damage to a part of myocardium by an inadequate blood supply is termed

Myocardial infarction is commonly called

The state of heart when it is not pumping blood effectively enough to meet the needs of the body is termed

is a symptom of acute chest pain appears when no enough oxygen is reaching the heart muscle.

The sudden stoppage of heartbeat is termed

Purkinje fibres are specialised

Which of the following factors may lead to atherosclerosis?

Components of blood responsible for coagulation are

Hypertension is a disorder of the

The neural centre which regulates the activity of the human heart is located in

The cardiac output in a healthy man averages

Nerve impulses from ANS and hormones like epinephrine

The capillaries are lined by the same type of epithelium that also lines

Consider the following statements (A-D) and select the correct option. A. Coronary Artery disease, (CAD) is often referred to as Atherosclerosis. B. Heart failure means sudden death of heart muscle tissue due to inadequate blood supply. C. High blood pressure leads to heart diseases and also affects vital organs like brain and kidney. D. Angina occurs due to conditions that affect the blood flow.

Sino-atrial node (SAN)

Mark the correct combination with regard to ECG.

Which of the following is responsible for initiating and maintaining the rhythmic contractile activity of the heart?

The layer of the blood vessel wall is made of squamous epithelium is

Match the following and choose the correct option. Column I Column II (a) Fishes (i) two-chambered heart (b) Mammals (ii) three-chambered heart with undivided ventricle (c) Amphibians (iii) three-chambered heart with incompletely divided ventricle (d) Reptiles (iv) four-chambered heart (a) (b) (c) (d) 1 i iv ii iii 2 i ii iv iii 3 i iv iii ii 4 ii i iii iv

ECG gives important information regarding all the following conditions, except

Which of the following represents the descending order of number of various types of WBCs?

In amphibians, the left atrium receives oxygenated blood from which of the following?

In an average healthy adult human, SAN can generate a maximum of number of action potentials.

In erythroblastosis foetalis,

Which one of the following statements is correct regarding blood pressure?

Which of the following system carries blood from the intestine to the liver?

What would be the heart rate of person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

If due to some injury, the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

In electrocardiography P-Q interval represents

Who among the following has normal blood pressure? (i) Mr. A 120/80 mm Hg (ii) Mr. B 80/120 mg Hg (iii) Mrs. A. 90/80 mm Hg (iv) Mrs. B 150/80 mm Hg

Which of the following waves of ECG are correctly paired with their events?

Find the incorrect pairing.

Which one of the following vertebrate organs receives the oxygenated blood only?

To which of the following, a bundle of His passes stimulus of contraction?

Which of the following is the most abundant of all the cells found in the blood of humans?

A drop of each of the following is placed separately on four slides. Which of them will not coagulate?

The ventricles relax and the ventricular pressure falls causing the closure of semilunar valves, the above events are related to

The average lifespan is the highest for

Match the following with the types of leucocytes and their function. Column I Column II A Neutrophils i Heparin and Histamine B Basophils ii Antibody formation C Acidophils iii Anti-allergic D Lymphocytes iv Phagocytes A B C D 1 iv i iii ii 2 i iv iii ii 3 iii iv ii i 4 ii i iii iv

If due to some injury the chordae tendinae of the mitral valve of the human heart is partially non-functional, what will be the immediate effect?

The tallest positive wave in ECG represents

Which of the following structure produces the maximum number of action potentials per minute?

Find the correct match about blood.

Match the following and choose the correct option. Column – I Column – II A Heart attack (i) Due to closure of atrioventricular valves B Lubb sound (ii) Heart muscle is suddenly damaged C Cardiac arrest (iii) Due to closure of semilunar valves D Dubb sound (iv) Heart stop pumping blood effectively (v) Heart stop beating A B C D 1 ii iii iv i 2 iv i v iii 3 ii i v iii 4 ii i iv iii

A completely four-chambered heart is present in

The SAN generates an action potential which stimulates both the atria to undergo a simultaneous contraction and this is known as the

Blood pumped by the heart passes through large vessels into sinuses in

Tricuspid valve guards the opening between the

The normal level of haemoglobin per 100 mL of blood of a healthy individual is

Which of the following combination(s) is/are correct ? (a) Duration of one cardiac cycle 8.0 sec (b) Number of cardiac cycles in a minute 72 (c) Stroke volume 70 ml (d) Cardiac output 5000 L

An enzyme ‘X’ is required for the conversion of fibrinogen to fibrin. ‘X’ is formed due to catalytic action of another enzyme ‘Y’. ‘Y’ in the above statement is

Serum is plasma without

Erythroblastosis foetalis can occur if

Identify the INCORRECT combination from the following.

Graveyard of RBCs is

Lymph is a colourless fluid containing specialised …. (a) …. which are responsible for the …. (b) …. responses of the body. In the above (a) and (b) are (a) (b) 1 Lymphocytes Immune 2 Erythrocytes Neural 3 Monocytes Neural 4 Thrombocytes Immune

Megakaryocytes

Identify the INCORRECT combination from the following.

Graveyard of RBCs is

Erythroblastosis foetalis occurs in case of

The average lifespan of RBC in human blood is

Read the statements. A. Erythroblastosis foetalis is due to incompatibility between Rh -ve mother and Rh +ve foetus. B. Rh antibodies occur naturally in the plasma of Rh -ve persons.

Which of the following ions play a very important role in blood clotting?

Which of the following is often called the “graveyard of RBCs”?

Select the wrong statement about Rh blood grouping.

The least numerous leucocytes are

Erythroblastosis foetalis be avoided by administering

The enzyme complex that activates prothrombin to thrombin is

A fall in blood levels of albumin is most likely to affect

In adult humans, erythropoiesis occurs in

Normally, blood plasma does not contain

A person with ‘B’ type blood has

Erythroblastosis foetalis occurs in case of

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