PHYS 261 FINAL EXAM QUESTIONS
WITH CORRECT ANSWERS
D. stroke volume (SV) - correct answer ✔✔ 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
Na+ only - correct answer ✔✔ 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+
c. end-diastolic volume (EDV) - correct answer ✔✔ 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
E. end-systolic volume (ESV) - correct answer ✔✔ 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
stroke volume. - correct answer ✔✔ 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.
, Tropomyosin is pulled away from the myosin-binding site on actin. - correct answer ✔✔ 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.
pressure - correct answer ✔✔ The driving force for blood flow is a(n) ________ gradient.
gravity
pressure
osmotic
volume
a decrease in cardiac output - correct answer ✔✔ Which would NOT cause an increase in blood
pressure?
an increase in arterial resistance
a decrease in cardiac output
a decrease in arterial diameter
an increase in sympathetic activity
B. QRS complex - correct answer ✔✔ Match the name of the wave with the correlated event.
A. P wave
WITH CORRECT ANSWERS
D. stroke volume (SV) - correct answer ✔✔ 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
Na+ only - correct answer ✔✔ 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+
c. end-diastolic volume (EDV) - correct answer ✔✔ 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
E. end-systolic volume (ESV) - correct answer ✔✔ 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
stroke volume. - correct answer ✔✔ 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.
, Tropomyosin is pulled away from the myosin-binding site on actin. - correct answer ✔✔ 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.
pressure - correct answer ✔✔ The driving force for blood flow is a(n) ________ gradient.
gravity
pressure
osmotic
volume
a decrease in cardiac output - correct answer ✔✔ Which would NOT cause an increase in blood
pressure?
an increase in arterial resistance
a decrease in cardiac output
a decrease in arterial diameter
an increase in sympathetic activity
B. QRS complex - correct answer ✔✔ Match the name of the wave with the correlated event.
A. P wave
