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?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

One

Three

Two

Four

answer is B.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

During a cardiac cycle, each ventricle pumps out approximately 70 mL of blood which is called the stroke volume. The stroke volume multiplied by the heart rate (no. of beats per min.) gives the cardiac output. Therefore, the cardiac output can be defined as the volume of blood pumped out by each ventricle per minute and averages 5000 mL or 5 litres in a healthy individual.

Watch 3-min video & get full concept clarity