WCU PHYS 261 FINAL PAPER UPDATED COMPLETE QUESTIONS AND CORRECT ANSWERS BUNDLED REVIEW GUIDE

WCU PHYS 261 FINAL PAPER UPDATED
COMPLETE QUESTIONS AND CORRECT
ANSWERS BUNDLED REVIEW GUIDE

●● 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:


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