VI. What are the consequences of the following? (Write increases, 1. An increase

Question

VI. What are the consequences of the following? (Write increases, 1. An increase in heart rate 2. An increase in stroke volume 3. An increased ESV decreases or has no effect) the cardiac output. the cardiac output. the stroke volume. 4. During exercise, the cardiac output 5. An increase in cardiac sympathetic activity 6. An increase in cardiac sympathetic activity 7. An increase in parasympathetic activity 8. An increase in venous return 9. An increase in the end-diastolic volume 10. An in 11. An increase in cardiac sympathetic activity the K' permeability of the SA node. the rate of depolarization of the SA node the heart rate. the end-diastolic volume. the stroke volume. the sV. crease in the length of the cardiac muscle fibers prior to contraction the stroke volume.

Explanation / Answer

Ans...1..increase in heart rate increase cardiac output

Cardiac output is heart rate × stroke volume

Ans 2..Increase in stroke volume increase the cardiac output

CO=HR × SV

Ana 3..Increase in ESV decreases SV

Stroke volume= End diastolic volume - end systolic volume

Ans 4..During exercise cardiac output increases

Because heart rate increases

Ans 5.. no effect

Ans 6...increaSe

Ans 7..Decrease

8..Increase

9...Increase

10..Increase

11...increase

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