PHYS 261 FINAL EXAM QUESTIONS AND ANSWERS –
Latest Update 2026/2027 | Rated A+ | New | 100%
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A patient has a tumor that secretes high levels of aldosterone. Which would you
expect?
a. Hyperkalemia and decreased potassium in urine
b. Hyperkalemia and increased potassium in urine
c. Hypokalemia and decreased potassium in urine
d. Hypokalemia and increased potassium in urine - Answer- d. Hypokalemia and
increased potassium in urine
The hormone mainly responsible for the milk let-down reflex is
a. prolactin.
b. progesterone.
c. estrogen.
d. growth hormone.
e. oxytocin. - Answer- e. oxytocin.
Match each term with its definition.
A. cardiac output (CO)
,B. heart rate (HR)
C. end-diastolic volume (EDV)
D. stroke volume (SV)
E. end-systolic volume
(ESV)the volume of blood pumped out of the heart from one ventricle during one
contraction - Answer- D. stroke volume (SV)
The rapid depolarization phase of the action potentials of myocardial contractile
cells is due to which ion(s)?
Ca2+ only
K+ only Na+
only both
Ca2+ and K+
both Na+ and K+ - Answer- Na+ only
Match each term with its definition.
A. cardiac output (CO)
B. heart rate (HR)
C. end-diastolic volume (EDV)
D. stroke volume (SV)
E. end-systolic volume (ESV)
, the volume of blood in the ventricle available to be pumped out of the heart
during one contraction - Answer- c. end-diastolic volume (EDV)
The volume of blood ejected from each ventricle during a contraction is called the
end-diastolic
volume. stroke
volume. cardiac
reserve. cardiac
output.
end-systolic volume. - Answer- stroke volume.
What happens when calcium binds troponin?
Troponin binds to actin and causes sarcomere shortening.
Troponin changes shape and covers the SR calcium channel, which is a form of
negative feedback.
Tropomyosin is pulled away from the myosin-binding site on actin.
Troponin releases myosin and activates actin. - Answer- Tropomyosin is pulled
away from the myosinbinding site on actin.
The driving force for blood flow is a(n) ________ gradient.
Latest Update 2026/2027 | Rated A+ | New | 100%
Guaranteed Pass!!
A patient has a tumor that secretes high levels of aldosterone. Which would you
expect?
a. Hyperkalemia and decreased potassium in urine
b. Hyperkalemia and increased potassium in urine
c. Hypokalemia and decreased potassium in urine
d. Hypokalemia and increased potassium in urine - Answer- d. Hypokalemia and
increased potassium in urine
The hormone mainly responsible for the milk let-down reflex is
a. prolactin.
b. progesterone.
c. estrogen.
d. growth hormone.
e. oxytocin. - Answer- e. oxytocin.
Match each term with its definition.
A. cardiac output (CO)
,B. heart rate (HR)
C. end-diastolic volume (EDV)
D. stroke volume (SV)
E. end-systolic volume
(ESV)the volume of blood pumped out of the heart from one ventricle during one
contraction - Answer- D. stroke volume (SV)
The rapid depolarization phase of the action potentials of myocardial contractile
cells is due to which ion(s)?
Ca2+ only
K+ only Na+
only both
Ca2+ and K+
both Na+ and K+ - Answer- Na+ only
Match each term with its definition.
A. cardiac output (CO)
B. heart rate (HR)
C. end-diastolic volume (EDV)
D. stroke volume (SV)
E. end-systolic volume (ESV)
, the volume of blood in the ventricle available to be pumped out of the heart
during one contraction - Answer- c. end-diastolic volume (EDV)
The volume of blood ejected from each ventricle during a contraction is called the
end-diastolic
volume. stroke
volume. cardiac
reserve. cardiac
output.
end-systolic volume. - Answer- stroke volume.
What happens when calcium binds troponin?
Troponin binds to actin and causes sarcomere shortening.
Troponin changes shape and covers the SR calcium channel, which is a form of
negative feedback.
Tropomyosin is pulled away from the myosin-binding site on actin.
Troponin releases myosin and activates actin. - Answer- Tropomyosin is pulled
away from the myosinbinding site on actin.
The driving force for blood flow is a(n) ________ gradient.
