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WCU PHYS 261 Final Exam Questions And Answers 2025 Update
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©THEBRIGHT 2025 ALL RIGHTS RESERVED 10:54PM. 1 WCU PHYS 261 Final Exam Questions And Answers 2025 Update. The volume of blood pumped out of the heart from one ventricle during one contraction - AnswerStroke Volume (SV) The rapid depolarization phase of the action potentials of myocardial con...

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  • 13 de marzo de 2025
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©THEBRIGHT 2025 ALL RIGHTS RESERVED 10:54PM.




WCU PHYS 261 Final Exam Questions And
Answers 2025 Update.



The volume of blood pumped out of the heart from one ventricle during one contraction -
Answer✔Stroke Volume (SV)


The rapid depolarization phase of the action potentials of myocardial contractile cells is due to
which ion(s)? - Answer✔Na+ only


The volume of blood in the ventricle available to be pumped out of the heart during one
contraction - Answer✔End- diastolic volume (EDV)


The volume of blood left in the ventricle after it contracts - Answer✔End- systolic volume (ESV)


The volume of blood ejected from each ventricle during a contraction - Answer✔Stroke volume
(SV)


What happens when calcium binds to troponin? - Answer✔Tropomyosin is pulled away from
the myosin-binding site on actin.


The driving force for blood flow is a(n) ________ gradient. - Answer✔pressure


Which would NOT cause an increase in blood pressure? - Answer✔a decrease in cardiac output


Match the name of the wave with the correlated event:

1

, ©THEBRIGHT 2025 ALL RIGHTS RESERVED 10:54PM.




ventricular depolarization - Answer✔QRS complex


The function of transverse tubules is to - Answer✔rapidly conduct action potentials to the
interior of the muscle fiber.


Which is greater:
A) blood pressure when the peripheral vessels constrict

B) blood pressure when the peripheral vessels dilate - Answer✔A) blood pressure when the
peripheral vessels constrict


The P wave of an ECG corresponds to - Answer✔depolarization of the atria


The reflex that compliments a withdrawal reflex by making compensatory adjustments on the
opposite side of the body receiving the stimulus is the - Answer✔crossed extensor reflex


Your instructor announces a pop quiz. Which would you expect? - Answer✔Increased
sympathetic signaling and increased cardiac output


This protein is activated by the Ca2+-calmodulin complex to phosphorylate the myosin light
chain protein. - Answer✔myosin light chain kinase


In which situation would end- systolic volume (ESV) be the greatest? - Answer✔when
parasympathetic stimulation of the heart is increased


Striated muscles are so- called because of a repeating pattern of light and dark bands. One
repeating unit of the banding pattern is called a - Answer✔Sarcomere


The contraction cycle is initiated by the rise in _______ released from the sarcoplasmic
reticulum (SR). - Answer✔Ca2+



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