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PHYS 261 FINAL Exam Questions And Answers
|Latest 2025 | Guaranteed Pass.
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)
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
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)
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 - Answer✔E. end-systolic volume
(ESV)
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.
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, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
Troponin releases myosin and activates actin. - Answer✔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 - Answer✔pressure
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 - Answer✔a decrease in cardiac output
Match the name of the wave with the correlated event.
A. P wave
B. QRS complex
C. T wave
D. PR segment
E. ST segment
ventricular depolarization - Answer✔B. QRS complex
The function of transverse tubules is to
a. conduct ATP molecules out of the mitochondria throughout the sarcoplasm.
b. ensure a supply of glycogen throughout the muscle sarcoplasm.
c. store Ca2+ ions inside the muscle fiber.
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PHYS 261 FINAL Exam Questions And Answers
|Latest 2025 | Guaranteed Pass.
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)
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
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)
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 - Answer✔E. end-systolic volume
(ESV)
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.
2|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
Troponin releases myosin and activates actin. - Answer✔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 - Answer✔pressure
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 - Answer✔a decrease in cardiac output
Match the name of the wave with the correlated event.
A. P wave
B. QRS complex
C. T wave
D. PR segment
E. ST segment
ventricular depolarization - Answer✔B. QRS complex
The function of transverse tubules is to
a. conduct ATP molecules out of the mitochondria throughout the sarcoplasm.
b. ensure a supply of glycogen throughout the muscle sarcoplasm.
c. store Ca2+ ions inside the muscle fiber.
3|Page
