WCU PHYS 261 FINAL EXAM 2026 COMPLETE
QUESTIONS AND ANSWERS
◉ 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
◉ 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
QUESTIONS AND ANSWERS
◉ 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
◉ 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
