Which of the following structures doesn’t have cartilaginous rings?
The sum of inspiratory reserve volume, tidal volume and expiratory reserve volume is termed
During fever, the availability of oxygen to tissues (A) because the affinity of haemoglobin for oxygen (B) with increasing temperature. The correct option for the two blanks is: A B 1. increases increases 2. increases decreases 3. decreases increases 4. decreases decreases
The partial pressure of oxygen in the pulmonary vein is
A chemosensitive area situated in the medulla of the brain is highly sensitive to CO 2 and hydrogen ions. It mainly helps regulate
Inspiration is initiated by the
Incomplete cartilaginous rings support
The thoracic chamber is bound ventrally by the
The sound-producing organ in man is the
Which of the following occurs during exhalation?
Which of the following is a part of both digestive system and respiratory system?
Name the chronic respiratory disorder caused mainly by cigarette smoking.
Which of the following is true about foetal haemoglobin (HbF)?
Lung volumes of a person are given below. Tidal volume = 500 mL Inspiratory reserve volume = 1900 mL Expiratory reserve volume = 700 mL Residual volume = 1100 mL Calculate the inspiratory capacity of the person.
Which of the following best describes Hamburger’s phenomenon?
The volume of air that remains in the lungs after a normal expiration is termed
The majority of carbon dioxide produced by our body cells is transported to the lungs as
Which of the following is transported, at least partly, in a dissolved through the blood plasma?
Select the correct match.
Select the wrong statement.
Zinc is a co-factor of an enzyme required for the transport of
Select the correct features of pleura from the following. a. Double layered membrane with pleural fluid within. b. Reduces friction on the lung surface. c. The outer pleural membrane is in close contact with the lung surface.
Match the items given in column I with those in column II and select the correct option given below. Column-I Column-II a Tidal volume i. The additional volume of air, a person can inspire by a forcible inspiration b Inspiratory reserve volume ii. The volume of air remaining in the lungs even after a forcible expiration c Expiratory reserve volume iii. The volume of air inspired or expired during a normal respiration d Residual volume iv. The additional volume of air, a person can expire by a forcible expiration a b c d 1. i iv ii iii 2. iii ii i iv 3. iii i iv ii 4. iv iii ii i
Select the correct match.
On an average, a healthy human breathes about
High temperature
The per cent of oxygen transported in a dissolved state through the blood plasma is about
The respiratory membrane through which exchange of oxygen and carbon dioxide takes place consists of
Cutaneous respiration is the only mode of respiration in
The ratio of tidal volume to expiratory reserve volume in a healthy human is about
In the alveoli, the formation of oxyhaemoglobin is favoured by
The conducting part of our respiratory system ends at
Which of the following occurs during exhalation?
The rate of diffusion of gases through the respiratory membrane increases with an increase in A. surface area B. solubility of gases C. partial pressure difference D. membrane thickness E. molecular weight of the gases
The sum of inspiratory reserve volume, tidal volume and expiratory reserve volume is termed
The contraction of the diaphragm
The maximum volume of air a person can breathe out after a forced inhalation does not include
Every 100 ml of deoxygenated blood delivers approximately mL of CO 2 to the alveoli.
Total volume of air accommodated in the lungs at the end of a forced inspiration is termed
The ratio of residual volume to functional residual capacity in a healthy human is about
When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of
The maximum volume of air a person can breathe in after a forced expiration is known as :
In the pulmonary capillaries, formation of oxyhaemoglobin is favoured by
Which of the following cannot be measured by spirometry?
Air pollution can result in Emphysema, which is :
Which of the following is not correctly paired with its description?
Select the wrong match.
Branchial respiration occurs in
Which one of the following groups of three animals is correctly matched with their respiratory organs?
The chronic disorder in which alveolar walls are damaged leading to decrease in respiratory surface area is
Which of the following options correctly represents the conditions in asthma and emphysema, respectively?
Which of the following lacks cartilage?
The duration of inspiration is reduced by the stimulation of
Pneumotaxic centre is located in the
Which of the following is not a function of the nose?
Tidal volume is about per cent of total lung capacity.
The trachea divides into primary bronchi at the level of
Which one of the following statements is incorrect?
Every 100 ml of deoxygenated blood delivers approximately mL of CO 2 to the alveoli.
Which of the following is not a function of the human respiratory system?
Match the items given in column I with those in column II and select the correct option given below. Column-I Column-II a. Tidal volume i. 2500 – 3000 mL b. Inspiratory reserve volume ii. 1100 – 1200 mL c. Expiratory reserve volume iii. 500 mL d. Residual volume iv. 1000 – 1100 mL a b c d 1. i iv ii iii 2. iii ii i iv 3. iii i iv ii 4. iv iii ii i
Carbon monoxide poisoning is fatal because it directly affects
Mark the wrong statement about the carbonic anhydrase enzyme.
A network of tubules spread throughout the body supply air in
Moist cuticle helps with respiration in which of the following invertebrates?
A sound-producing cartilaginous box in humans is
Chemoreceptors involved in the regulation of ventilation are located in all of the following, except
The structure that is completely made of cartilage is
Functional residual capacity is the volume of air that remains in the lungs after a normal expiration. This includes
Prolonged inspiration occurs in
For air to flow into the lungs, the pressure inside the alveoli must become lower than the atmospheric pressure. This relationship between volume and pressure is called
What happens when the intrapulmonary pressure is less than atmospheric pressure?
Identify the correct statement with reference to transport of respiratory gases by blood.
The extra volume of air that can be inspired forcibly is
Select the correct statement from the following.
Which of the following is not a function of the nose?
The volume of air a healthy man normally inspires or expires is
Which of the following is not correctly paired with its description?
The rate of diffusion of gases through the respiratory membrane increases with an increase in A. surface area B. solubility of gases C. partial pressure difference D. membrane thickness E. molecular weight of the gases
Select the correct match.
Which of the following cause expiration? (a) Contraction of diaphragm (b) Decrease in thoracic volume (c) Raising of ribs and sternum (d) Increase in intrapulmonary pressure
The binding of oxygen with haemoglobin is primarily related to
Each haemoglobin molecule can carry a maximum of oxygen molecules.
Match the items given in column I with those in column II and select the correct option. Column I Column II (a) General body surface (i) Calotes (b) Lungs (ii) Pinctada (c) Tracheae (iii) Locusta (d) Gills (iv) Hydra (a) (b) (c) (d) (1) iv i iii ii (2) i ii iii iv (3) i ii iv iii (4) iii ii i iv
The conducting part of our respiratory system ends at
The diffusing capacity of carbon dioxide is higher than that of oxygen because
The exchange of gases in the alveoli of the lungs is influenced by all of the following, except
Hemoglobin’s affinity for oxygen
In the alveoli, the formation of oxyhaemoglobin is favoured by
Functional residual capacity is the volume of air that remains in the lungs after a normal expiration. This includes
The partial pressure of carbon dioxide in the atmosphere is
The volume of air a healthy man can inspire or expire per minute is approximately
The respiratory membrane through which exchange of oxygen and carbon dioxide takes place consists of
The per cent of oxygen transported in a dissolved state through the blood plasma is about
Match the items given in column I with those in column II and select the correct option. Column I Column II (a) Inspiratory capacity (i) TV+IRV (b) Functional residual capacity (ii) VC+RV (c) Expiratory capacity (iii) TV+ERV (d) Total lung capacity (iv) ERV+RV (a) (b) (c) (d) (1) iii i iv ii (2) iv ii i iii (3) i iv iii ii (4) iv iii i ii
Cutaneous respiration occurs in
Select the incorrect statement about the larynx.
During inspiration,
Which of the following cause expiration? (a) Contraction of diaphragm (b) Decrease in thoracic volume (c) Raising of ribs and sternum (d) Increase in intrapulmonary pressure
The sound-producing organ in man is the
The binding of oxygen with haemoglobin is primarily related to
The thoracic chamber is bound ventrally by the
Match the items given in column I with those in column II and select the correct option given below. Column-I Column-II a Tidal volume i. The additional volume of air, a person can inspire by a forcible inspiration b Inspiratory reserve volume ii. The volume of air remaining in the lungs even after a forcible expiration c Expiratory reserve volume iii. The volume of air inspired or expired during a normal respiration d Residual volume iv. The additional volume of air, a person can expire by a forcible expiration a b c d 1. i iv ii iii 2. iii ii i iv 3. iii i iv ii 4. iv iii ii i
The diffusing capacity of carbon dioxide is higher than that of oxygen because
The volume of air a healthy man can inspire or expire per minute is approximately
Hemoglobin’s affinity for oxygen
Select the correct statement from the following.
The volume of air a healthy man normally inspires or expires is
The ratio of residual volume to functional residual capacity in a healthy human is about
Select the correct match.
Compared to arterial blood, the plasma of venous blood has
The amount of CO 2 exhaled by a human with a cardiac output of 5 litres is approximately
Select the correct statement about the thoracic chamber.
Total volume of air accommodated in the lungs at the end of a forced inspiration is termed
The amount of CO 2 that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher compared to that of O 2 because
The volume of air that remains in the lungs after a normal expiration is termed
The partial pressure of oxygen in oxygenated blood is
When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
Pneumotaxic centre is located in the
Which of the following cannot be measured by spirometry?
Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. This is done by the
In the graph of oxygen-haemoglobin dissociation curve, x-axis represents
Which of the following options correctly represents the conditions in asthma and emphysema, respectively?
Select the correct match.
Match the items given in column I with those in column II and select the correct option. Column I Column II (a) General body surface (i) Reptiles (b) Lungs (ii) Molluscs (c) Tracheae (iii) Insects (d) Gills (iv) Coelenterates (a) (b) (c) (d) (1) iv i iii ii (2) i ii iii iv (3) i ii iv iii (4) iii ii i iv
The amount of CO 2 exhaled by a human with a cardiac output of 5 litres is approximately
The contraction of the diaphragm
Select the correct statement about the larynx.
Chloride shift facilitates
Select the correct sequence of the following. A. Per cent of oxygen transported through RBC B. Per cent of oxygen transported through plasma C. Per cent of carbon dioxide transported in a dissolved state through plasma D. Per cent of carbon dioxide transported as carbamino compounds E. Per cent of carbon dioxide transported as bicarbonates
The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and / or characteristic.
Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls
Approximately seventy percent of carbon-dioxide absorbed by the blood will be transported to the lungs
Select the correct events that occur during expiration. (a) Contraction of diaphragm (b) Contraction of external inter-costal muscles (c) Pulmonary volume decreases (d) Intra pulmonary pressure increases
Identify the correct statement with reference to transport of oxygen.
Reduction in pH of blood will
The partial pressure of oxygen in the alveoli of the lungs is
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
Vital Capacity is defined as maximum volume of air a person can breathe in after a forced expiration. It includes
Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his expiratory capacity if the Residual Volume is 1200 mL?
Match the items given in column I with those in column II and select the correct option given below. Column I Column II A. Tidal volume (i) 2500 – 3000 mL B. Inspiratory reserve volume (ii) 1100 – 1200 mL C. Expiratory reserve volume (iii) 500 – 550 mL D. Residual volume (iv) 1000 – 1100 mL
Match the items given in column I with those in column II and select the correct option given below. Column I Column II A. Tidal volume (i) 2500 – 3000 mL B. Inspiratory reserve volume (ii) 1100 – 1200 mL C. Expiratory reserve volume (iii) 500 – 550 mL D. Residual volume (iv) 1000 – 1100 mL
Which of the following is an occupational respiratory disorder?
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder that cause wheezing due to
A person with a tidal volume of 500 mL, residual volume of 1200 mL and vital capacity of 4300 mL would have a total lung capacity of
Select the correct events that occur during inspiration. (a) Contraction of diaphragm (b) Contraction of external inter-costal muscles (c) Pulmonary volume decreases (d) Intra pulmonary pressure increases
Identify the wrong statement with reference to transport of oxygen.
The Total Lung Capacity (TLC) is the total volume of air accomodated in the lungs at the end of a forced inspiration. This includes:
During normal quiet breathing, the amount of air present in the lungs of a healthy man at the end of inspiration is about
In a hypothermic patient whose body temperature is 34°C,
Inadequate exhalation of CO 2 causes
Maximum volume of air that can be inhaled during a single breath is
Pneumotaxic centre is located in the
The lungs of a stillborn (born dead) baby
A person breathes in forcibly and then breaths out forcibly. The amount of air exhaled and the amount of air left in his lungs after that exhalation are respectively
Select the correct statement.
Which of the following is not true about the plasma membrane of human erythrocytes?
The maximum extra volume of air that can be expired by forceful expiration after the end of a normal tidal expiration is termed
Select the events that occur in the erythrocytes in the systemic capillaries. A. Dissociation of H 2 CO 3 into CO 2 and H 2 O . B. Dissociation of H 2 CO 3 into H + and HCO 3 – . C. Formation of H 2 CO 3 from CO 2 and H 2 O . D. Formation of H 2 CO 3 from H + and HCO 3 – .
Select the correct match
The exchange of gases in the alveoli of the lungs is influenced by all of the following, except
The partial pressure of oxygen in the pulmonary vein is
Match the items given in Column I with those in Column II and select the correct option given below: Column I Column II a. Tidal volume i. 2500 – 3000 mL b. Inspiratory Reserve volume ii. 1100 – 1200 mL c. Expiratory Reserve volume iii. 500 mL d. Residual volume iv. 1000 – 1100 mL
Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. This is done by the
Match the items given in Column I with those in Column II and select the correct option given below: Column I Column II (a) Tidal volume (i) The additional volume of air, a person can inspire by a forcible inspiration (b) Inspiratory Reserve volume (ii) The volume of air remaining in the lungs even after a forcible expiration (c) Expiratory Reserve volume (iii) The volume of air inspired or expired during a normal respiration (d) Residual volume (iv) The additional volume of air, a person can expire by a forcible expiration
Which one of the following statements is incorrect ?
Asthma is caused due to
Emphysema is characterised by
Mark the correct one where the values of partial pressure of gases is one and same
The partial pressure of oxygen in the alveoli is
Spasm of smooth muscles present in the walls of the bronchi and bronchioles is associated with
The volume of air that remains in the lungs after a normal expiration is termed
Which of the following is not an occupational respiratory disorder?
Select the wrong statement.
The trachea divides into primary bronchi at the level of
The inspiratory capacity, functional residual capacity and residual volume of a person are 3,500 mL, 2,300 mL and 1,200 mL, respectively. What is his vital capacity?
In asthma, muscle spasm causes constriction of small bronchioles but not trachea because
Neural signals from pneumotaxic centre
Match the items given in column I with those in column II and select the correct option. Column I Column II (a) Larynx (i) Common passage for food and air (b) Trachea (ii) Exchange of gases (c) Pharynx (iii) Incomplete cartilaginous rings (d) Alveoli (iv) Sound box a b c d 1. ii iii i iv 2. iv iii i ii 3. iii i ii iv 4. iii iv i ii
The partial pressure of oxygen in the atmosphere is
Compared to atmospheric air, the alveolar air has
The conducting zone of the respiratory system
Select the incorrect match about the boundaries of the thoracic chamber.
Select the correct statement.
Total volume of air a person can expire after a normal inspiration is termed
The maximum volume of air a person can breathe in after a forced expiration is termed
The partial pressure of oxygen in the systemic arteries is
Select the wrong statement.
The inhaled air encounters which of the flowing first?
The majority of carbon dioxide produced by our body cells is transported to the lungs as
The per cent of carbon dioxide that is transported from the tissues to the lungs as carbamino compounds is
Oxygen-haemoglobin dissociation curve is useful in studying the effect of which of the following on the binding of oxygen to haemoglobin?
Identify the wrong statement :
Which of the following part of the respiratory tract does not have cartilaginous rings in its wall ?
Which of the following is the correct passage of air from outside into lungs ?
All of the following from conducting part of the respiratory tract, except
Which of the following is an incorrect statement w.r.t alveoli of lungs ?
The inner alveolar surface area of lungs is
is a flap of cartilage behind the root of tongue, which is depressed during swallowing to cover the opening of windpipe.
Cutaneous respiration occurs in
Which of the following is not a part of the human respiratory system?
The food way and airway cross in the
Which of the following enters the lungs?
Which of the following is not a lung disorder?
The maximum extra volume of air that can be expired by forceful expiration after the end of a normal tidal expiration is termed
Pneumotaxic centre is located in the
The volume of air inspired or expired during a normal respiration is termed as
When you hold your breath, which of the following stimulus would first lead to the urge to breathe?
Select the correct path of the passage of air through the human respiratory tract.
Which of the following lacks cartilage?
Which of the following is not correctly paired with its description?
Select the correct statement about breathing in man.
Which of the following occurs during exhalation?
Inspiration is initiated by the
Which of the following cannot be measured by normal spirometry?
Which of the following are equal?
Select the correct statement.
The amount of CO 2 that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher compared to that of O 2 because
In the alveoli, the formation of oxyhaemoglobin is favoured by
Neural signals from pneumotaxic centre
Asthma is due to
When you hold your breath, which of the following stimulus would first lead to the urge to breathe?
Which of the following options correctly represents the conditions in asthma and emphysema, respectively?
Pulmonary fibrosis is most commonly associated with
An increase in (A) in the blood causes an increase in (B) , leading to an (C) in breathing rate. (A) (B) (C) 1. CO 2 H + decrease 2. CO 2 pH increase 3. CO 2 H + increase 4. O 2 H + increase
During exhalation, the diaphragm is
The partial pressure of oxygen in the pulmonary vein is
The partial pressure of oxygen in oxygenated blood is
In the human body, there is a concentration gradient for carbon dioxide
In the lungs, oxygen-haemoglobin dissociation curve shifts to the
Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. This is done by the
Emphysema is characterised by
The diffusion membrane is comprised of
Wheezing is a symptom of
What per cent of carbon dioxide is transported by the blood plasma?
Match the following and choose the correct option. Column I Column II (a) Carbamino haemoglobin (i) 70 % (b) O 2 in plasma (ii) 7 % (c) Oxyhaemoglobin (iii) 20-25 % (d) CO 2 in plasma (iv) 3 % (v) 97 %
Match the following and choose the correct option. Column I Column II (a) Carbamino haemoglobin (i) 70 % (b) O 2 in plasma (ii) 7 % (c) Oxyhaemoglobin (iii) 20-25 % (d) CO 2 in plasma (iv) 3 % (v) 97 %
How many of the following organisms exchange O 2 with CO 2 by simple diffusion over their entire body surface? a. Insects b. Flatworms c. Earthworms d. Coelenterates e. Molluscs f. Sponges
Match the following and choose the correct option. Column I Column II (a) Carbamino haemoglobin (i) 70 % (b) O 2 in plasma (ii) 7 % (c) Oxyhaemoglobin (iii) 20-25 % (d) CO 2 in plasma (iv) 3 % (v) 97 %
Relaxation of diaphragm and the inter-costal muscles
Formation of oxyhaemoglobin is favoured by
Friction on the lung-surface is prevented by
Mark the wrong statement.
The point at which right and left primary bronchi form is
Lung fibrosis is observed in
Which of the following rely heavily on their skin for gas exchange?
Hemoglobin’s affinity for oxygen
Which of the following is not a part of the diffusion membrane (respiratory membrane)?
Which of the following factors does not alter the rate of breathing by influencing the chemoreceptors?
The regions of brain that regulate respiration are
Residual volume is more than
The exchange part of human respiratory system does not include
The amount of air contained in the lungs after a forceful inspiration is called
Contraction of diaphragm
The partial pressure of the oxygen in the atmosphere is
Which of the following enzymes plays an important role in the transport of CO 2 through RBCs?
Select the correct path of exhaled air in man.
When there is drop in the blood pH,
Mark the correct statement about the trachea.
To which two organ systems does the pharynx belong?
Partial pressure of CO 2 is maximum in
Which of the following is responsible for reducing the duration of inspiration?
If, VC = Vital capacity, ERV = Expiratory reserve volume, TV = Tidal volume, IRV = Inspiratory reserve volume and IC = Inspiratory capacity, then which of the options is correct?
Mark the correct set of organisms and its respiratory organ.
Oxygen dissociation curve shifts right under which of the following conditions?
Prolonged exposure to stone dust mainly leads to
Every 100 ml of oxygenated blood can deliver around X of O 2 to the tissues and every 100 ml of deoxygenated blood delivers approximately Y of CO 2 to the alveoli. Mark the correct set of X and Y.
In humans, respiratory membrane is made of
The maximum volume of air a person can breathe in after a normal expiration is known as
The alveolar walls are damaged due to which respiratory surface is decreased in a chronic respiratory disorder. The major cause of that disorder is
In lung, maximum gaseous exchange is due to
The haemoglobin of a human foetus
What will be the pO 2 of the atmosphere to facilitate inspiration?
Select the incorrect statement.
Which of the following statement is incorrect ?
Which of the following is correct regarding chemosensitive area?
Which of the following factors contributes to the increase of the pulmonary volume?
Choose the incorrect match in the following.
Intercostal muscles are attached to
All the following factors are favourable for the formation of oxyhaemoglobin except
Which of the following is a chronic respiratory disorder in which alveolar walls are damaged due to which respiratory surface is decreased?
Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct?
Which of the following conditions found in the aveoli which is favourable for the formation of oxyhaemoglobin?
The partial pressure of oxygen at the site A(alveoli of lungs) and B (oxygenated blood) is
Which of the following mechanism help to exhale air out of the lungs?
Select the set of medullary respiratory centres in brain?
The total volume of air accommodated in the lungs at the end of a forced inspiration is called
Find the odd one out with respect to the respiratory organ.
Inspiration occurs when
Mark the correct combination with regard to thoracic chamber. Dorsal Ventral Lateral Lower side 1. Sternum Vertebral column Diaphragm Ribs 2. Ribs Vertebral column Sternum Diaphragm 3. Vertebral column Sternum Ribs Diaphragm 4. Vertebral column Sternum Diaphragm Ribs
During inspiration,
Carboxyhaemoglobin is haemoglobin bound to
The ratio of tidal volume to expiratory reserve volume in a healthy human is about
Match the items given in column I with those in column II and select the correct option. Column I Column II (a) Inspiratory capacity (i) TV+IRV (b) Functional residual capacity (ii) VC+RV (c) Expiratory capacity (iii) TV+ERV (d) Total lung capacity (iv) ERV+RV (a) (b) (c) (d) (1) iii i iv ii (2) iv ii i iii (3) i iv iii ii (4) iv iii i ii
During inspiration,
Select the correct match.
Each haemoglobin molecule can carry a maximum of oxygen molecules.
The exchange of gases in the alveoli of the lungs is influenced by all of the following, except
Our RBCs transport
The partial pressure of oxygen in the alveoli is
Match the items given in column I with those in column II and select the correct option. Column I Column II (a) General body surface (i) Reptiles (b) Lungs (ii) Molluscs (c) Tracheae (iii) Insects (d) Gills (iv) Coelenterates (a) (b) (c) (d) (1) iv i iii ii (2) i ii iii iv (3) i ii iv iii (4) iii ii i iv
Select the correct statement about human respiratory system.
Select the correct statement about the larynx.
Which lung capacity will you demonstrate by inhaling as deeply as possible and then exhaling as much air as you can?
Select the correct sequence of the following. A. Per cent of oxygen transported through RBC B. Per cent of oxygen transported through plasma C. Per cent of carbon dioxide transported in a dissolved state through plasma D. Per cent of carbon dioxide transported as carbamino compounds E. Per cent of carbon dioxide transported as bicarbonates
The enzyme that plays an important role in the transport of carbon dioxide is
The binding of CO 2 to haemoglobin is primarily related to
A chemosensitive area situated in the medulla of the brain is highly sensitive to CO 2 and hydrogen ions. It mainly helps regulate
Chloride shift facilitates
Match the items given in column I with those in column II and select the correct option given below. Column-I Column-II a. Tidal volume i. 2500 – 3000 mL b. Inspiratory reserve volume ii. 1100 – 1200 mL c. Expiratory reserve volume iii. 500 mL d. Residual volume iv. 1000 – 1100 mL a b c d 1. i iv ii iii 2. iii ii i iv 3. iii i iv ii 4. iv iii ii i
Select the correct path of the passage of air through the human respiratory tract.
Select the correct match.
Asthma is due to
Pulmonary fibrosis is most commonly associated with
The trachea divides into primary bronchi at the level of
An increase in (A) in the blood causes an increase in (B) , leading to an (C) in breathing rate. (A) (B) (C) 1. CO 2 H + decrease 2. CO 2 pH increase 3. CO 2 H + increase 4. O 2 H + increase
In the human body, there is a concentration gradient for carbon dioxide
Which of the following occurs during exhalation?
Emphysema is characterised by
The enzyme that plays an important role in the transport of carbon dioxide is
During fever, the availability of oxygen to tissues (A) because the affinity of haemoglobin for oxygen (B) with increasing temperature. The correct option for the two blanks is: A B 1. increases increases 2. increases decreases 3. decreases increases 4. decreases decreases
Select the correct statement about human respiratory system.
Which lung capacity will you demonstrate by inhaling as deeply as possible and then exhaling as much air as you can?
Match the items given in column I with those in column II and select the correct option. Column I Column II (a) Larynx (i) Common passage for food and air (b) Trachea (ii) Exchange of gases (c) Pharynx (iii) Incomplete cartilaginous rings (d) Alveoli (iv) Sound box a b c d 1. ii iii i iv 2. iv iii i ii 3. iii i ii iv 4. iii iv i ii
The respiratory (diffusion membrane) across which exchange of gases occurs in the lungs consists of all the following, except
Select the correct statement about the thoracic chamber.
The binding of CO 2 to haemoglobin is primarily related to
The maximum volume of air a person can breathe out after a forced inhalation does not include
Compared to arterial blood, the plasma of venous blood has
Which of the following is a part of both digestive system and respiratory system?
The amount of air breathed during inspiration and expiration at rest is termed
Cutaneous respiration occurs in
Neural signals from pneumotaxic centre
In the lungs, oxygen-haemoglobin dissociation curve shifts to the
During exhalation, the diaphragm is
Which of the following contract during inspiration? (a) Diaphragm (b) External intercostal muscles (c) Internal intercostal muscles (d) Abdominal muscles
Match the items given in column I with those in column II and select the correct option. Column I Column II (a) General body surface (i) Calotes (b) Lungs (ii) Pinctada (c) Tracheae (iii) Locusta (d) Gills (iv) Hydra (a) (b) (c) (d) (1) iv i iii ii (2) i ii iii iv (3) i ii iv iii (4) iii ii i iv
Select the correct match.
High temperature
The partial pressure of oxygen in the alveoli is
Functional residual capacity is the volume of air that remains in the lungs after a normal expiration. This includes
Which of the following is not a function of the nose?
Our RBCs transport
The partial pressure of carbon dioxide in the atmosphere is
On an average, a healthy human breathes about
Select the incorrect statement about the larynx.
Which of the following is not correctly paired with its description?
The respiratory (diffusion membrane) across which exchange of gases occurs in the lungs consists of all the following, except
The amount of air breathed during inspiration and expiration at rest is termed
In the alveoli, the formation of oxyhaemoglobin is favoured by
The majority of carbon dioxide produced by our body cells is transported to the lungs as
