Question

Which of the following statement is incorrect about cardiac output?

• A. It's average value is $5000$ ml/min.
• B. The stroke volume multiplied by the heart rate, gives the cardiac output.
• C. It is the volume of blood pumped out by each ventricle per minute.
• D. The body has no ability to alter the cardiac output.

Answer 1

The correct option is D The body has no ability to alter the cardiac output.

• Cardiac output refers to the volume of blood pumped out per ventricle per minute.
• It is the product of the heart rate, also known as number of heart beats per minute and the stroke volume.
• There are certain factors that affect stroke volume and heart rate in turn can affect the cardiac output like hormones, fitness level, age, gender etc.
• For a healthy person, the average cardiac output at rest is 5 L/min.

So the correct answer is option D.