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PHYS 261 FINAL EXAM QUESTIONS AND VERIFIED
ANSWERS. 2025
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 - (answers)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+ - (answers)Na+ only
Match each term with its definition.
, 2
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 - (answers)c. end-diastolic volume (EDV)
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 left in the ventricle after it contracts - (answers)E. end-
systolic volume (ESV)
The volume of blood ejected from each ventricle during a contraction is called the
, 3
end-diastolic volume.
stroke volume.
cardiac reserve.
cardiac output.
end-systolic volume. - (answers)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. - (answers)Tropomyosin is pulled
away from the myosin-binding site on actin.
The driving force for blood flow is a(n) ________ gradient.
gravity
pressure
osmotic
volume - (answers)pressure
PHYS 261 FINAL EXAM QUESTIONS AND VERIFIED
ANSWERS. 2025
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 - (answers)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+ - (answers)Na+ only
Match each term with its definition.
, 2
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 - (answers)c. end-diastolic volume (EDV)
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 left in the ventricle after it contracts - (answers)E. end-
systolic volume (ESV)
The volume of blood ejected from each ventricle during a contraction is called the
, 3
end-diastolic volume.
stroke volume.
cardiac reserve.
cardiac output.
end-systolic volume. - (answers)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. - (answers)Tropomyosin is pulled
away from the myosin-binding site on actin.
The driving force for blood flow is a(n) ________ gradient.
gravity
pressure
osmotic
volume - (answers)pressure
