PHYS 261 FINAL EXAM QUESTIONS
AND ACTUAL ANSWERS.
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)
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.
, 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
AND ACTUAL ANSWERS.
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)
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.
, 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
