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  • Cardiac output is determined by  Option: 1 Stroke volume  <div cl

Cardiac output is determined by

 

Option: 1

Stroke volume

 


Option: 2

Stroke volume


Option: 3

Both a and b

 


Option: 4

Blood flow

 


Answers (1)

best_answer

 

 

As we have learnt:

Cardiac output:

  • The volume of blood ejected from the left or right ventricle into the aorta (pulmonary trunk) per minute is called cardiac output
  • Heart of a normal person beats 72 times per minute and pumps out 70 ml of blood per beat
  • It is calculated by the formula

                Cardiac output = stroke volume . heart rate
                                        = 70 ml. 72 per min
                                         = 5040 ml per min

  • The stroke volume depends on venous return i.e. the amount of blood delivered to the heart by veins
  • Cardiac output is not constant, it varies with physical activity
  • During vigorous exercise, cardiac output increases as much as 21L per min

 

- 

 

Cardiac output is determined by heart rate as well as stroke volume. Hence, the correct answer is option c.

Posted by

Sanket Gandhi

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