In a normal person at rest, the cardiac output or amount of blood pumped per minute by the left ventricle is approximately

1-2 L/min

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1 L/min

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2 L/min

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5 L/min

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Solution

The correct option is A 5 L/min
The amount of blood flowing from the heart (from the left ventricle to the aorta) over a given period of time is known as cardiac output.

Cardiac output = Stroke volume x Heart rate (ventricular systole/min)

: Stroke volume = Volume of blood pumped by heart
Heart beat
70ml x 72/min = 5040 ml/min.
approx 5 L/min.
Thus, the correct option is D.

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Similar questions

Q. (i) During a cardiac cycle each ventricle pumps out approximately

70

mL of blood which is called the stroke volume.
(ii) The cardiac output of an athlete will be much higher than that of an ordinary man.
(iii) The body has no the ability to alter the stroke volume and the cardiac output.
(iv) The cardiac output can be defined as the volume of blood pumped out by each ventricle per minute.
(v) Volume of blood pumped by left ventricle is higher than blood pumped by right ventricle.
How many statements are correct?

Stroke volume is the amount of blood the left ventricle pumps out in one cardiac cycle. This is around 70ml. Now, to get the cardiac output, we have to multiply (i)__ with the normal heart rate of (ii)__ /min and we get (iii)__ ml/min. This means that in one minute, each ventricle of a normal heart pumps about (iv)__ litres of blood out.

Q. Read the following statements:
(i) During a cardiac cycle, both ventricles pump out approximately

70 ml

of blood called stroke volume.
(ii) Cardiac output can be defined as volume of blood pumped out by both ventricle per minute.
(iii) Cardiac output of an athlete will be higher than that of an ordinary man.
(iv) During each cardiac cycle two prominent sounds are produced.
How many statements are correct?

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What is the approximate amount of blood pumped by each ventricle of the heart during one cardiac cycle?

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