PHYS 261 FINAL EXAM
1. 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
2. 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+
3. 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
4. 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)
, PHYS 261 FINAL EXAM
the volume of blood left in the ventricle after it
contracts
5. 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.
6. 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.
7. The driving force for blood flow is a(n) ____
gradient.
gravity
pressure
osmotic
volume
8. 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
, PHYS 261 FINAL EXAM
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
9. 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.
d. rapidly move action potentials to the interior of the
muscle fiber.
10. Which is greater?
a. blood pressure when the peripheral vessels con-
strict
b. blood pressure when the peripheral vessels dilate
11. The P wave of an ECG corresponds to
a. the progressive wave of ventricular
b. depolarization.
c. depolarization of the atria.
d. repolarization of the atria.
e. repolarization of the ventricles.
f. None of the answers are correct.
12. The reflex that complements a withdrawal reflex by
making compensatory adjustments on the opposite
side of the body receiving the stimulus is the
a. stretch reflex.
1. 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
2. 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+
3. 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
4. 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)
, PHYS 261 FINAL EXAM
the volume of blood left in the ventricle after it
contracts
5. 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.
6. 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.
7. The driving force for blood flow is a(n) ____
gradient.
gravity
pressure
osmotic
volume
8. 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
, PHYS 261 FINAL EXAM
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
9. 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.
d. rapidly move action potentials to the interior of the
muscle fiber.
10. Which is greater?
a. blood pressure when the peripheral vessels con-
strict
b. blood pressure when the peripheral vessels dilate
11. The P wave of an ECG corresponds to
a. the progressive wave of ventricular
b. depolarization.
c. depolarization of the atria.
d. repolarization of the atria.
e. repolarization of the ventricles.
f. None of the answers are correct.
12. The reflex that complements a withdrawal reflex by
making compensatory adjustments on the opposite
side of the body receiving the stimulus is the
a. stretch reflex.
