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Author Question: The heart's ability to vary stroke volume based solely on changes in end-diastolic volume is based ... (Read 42 times)

Collmarie

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on: Jul 16, 2018
The heart's ability to vary stroke volume based solely on changes in end-diastolic volume is based on what mechanism?
 
  a. Automaticity
  b. Autoregulation
  c. Bohr equation
  d. Frank-Starling's law

Question 2

What is a normal cardiac ejection fraction?
 
  a. 24
  b. 44
  c. 64
  d. 84


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Ddddd

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
The heart's ability to change stroke volume solely according to the EDV is an intrinsic regulatory mechanism based on the Frank-Starling's law.

Answer to Question 2

ANS: C
Thus, on each contraction, the normal heart ejects approximately two-thirds of its stored volume. Decreases in ejection fraction are normally associated with a weakened myocardium and de-creased contractility.


Collmarie

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Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

momolu

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Reply 3 on: Yesterday
Gracias!

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