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liberstina [14]
3 years ago
11

As your skeletal muscles contract during physical activity, more blood is returned to the heart. Which variable would be affecte

d and what would be the outcome of this action?
a.) Contractility would be increased, which would result in a larger cardiac output.
b.) Afterload would increase, which would increase cardiac output.
c.) Preload would be increased, which would result in a larger cardiac output.
d.) End-systolic volume would be increased, which would increase cardiac output.
Biology
1 answer:
Vinil7 [7]3 years ago
6 0

Answer:

As a result of skeletal muscle contraction in physical exercise, the venous return - amount of blood that goes to the heart - is greater, so preload would be increased, which would result in a larger cardiac output.

Explanation:

Preload is a term associated with heart function, which consists of the amount of blood that reaches the ventricles from venous circulation.

This preload is able to occupy a space and stretch the walls of the ventricle and determine the amount of blood that will be pumped during ventricular contraction (systole).

In terms of cardiovascular function, preload depends on:

  • <em>Final Diastolic Pressure of the Left Ventricle. </em>
  • <em>Final Diastolic Radius of the Left Ventricle. </em>
  • <em>Thickness of the ventricle. </em>
  • <em>Central venous pressure </em>
  • <em>The speed of venous return. </em>

A consequence of the increased volume of blood in the ventricle -due to a higher preload- is the increase in cardiac output.

Learn more:

Decreased cardiac ouput brainly.com/question/8677396

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