1
ANATOMY AND PHYSIOLOGY CHAPTER 20 (THE
HEART) EXAM –QUESTIONS AND CORRECT
ANSWERS -2026 PREP
A heart murmur might be caused by
a) aortic valve insufficiency.
b) pulmonic valve insufficiency.
c) mitral valve insufficiency.
d) swirling of blood in the ventricle.
e) All of the answers are correct. - Correct Answer✓✓ e) All of the
answers are correct
An increase in the rate of action potentials from baroreceptors will
trigger a reflex to
a) decrease in blood pressure.
b) decrease in heart rate.
c) increase in heart rate.
d) both decrease heart rate and decrease pressure.
e) both increase heart rate and increase pressure. - Correct Answer✓✓
d) both decrease heart rate and decrease pressure
Blood flowing in the vena cava will next enter the __________.
a) left ventricle
, 2
b) right ventricle
c) left atrium
d) right atrium - Correct Answer✓✓ d) right atrium
Blood is supplied to the left atrium by the
a) phrenic arteries.
b) right coronary artery.
c) brachiocephalic artery.
d) left coronary artery.
e) pulmonary arteries. - Correct Answer✓✓ d) left coronary artery
Blood is supplied to the myocardium by
a) the coronary sinus.
b) contact with blood in the pumping chambers.
c) the coronary arteries.
d) arteries that branch off the subclavian arteries.
e) arteries that branch from the pulmonary arteries. - Correct
Answer✓✓ c) coronary arteries
Blood returning to the heart from the pulmonary circuit first enters
the __________.
a) pulmonary valve
b) left atrium
, 3
c) pulmonary trunk
d) right atrium - Correct Answer✓✓ b) left atrium
Blood returning to the heart from the systemic circuit first enters the
a) conus arteriosus.
b) left atrium.
c) left ventricle.
d) right ventricle.
e) right atrium. - Correct Answer✓✓ e) right atrium
Cardiac muscle cells and skeletal muscle cells differ in a few ways.
Which of the following is not one of them?
a) Cardiac muscle cells branch.
b) Skeletal muscle cells lack intercalated discs.
c) Cardiac muscle cells are smaller in size.
d) Cardiac muscle cells have a single, centered nucleus.
e) Cardiac muscle cells lack transverse tubules. - Correct Answer✓✓ e)
Cardiac muscle cells lack transverse tubules.
Depolarization of the ventricles is represented on an
electrocardiogram by the
a) QRS complex.
b) S wave.
ANATOMY AND PHYSIOLOGY CHAPTER 20 (THE
HEART) EXAM –QUESTIONS AND CORRECT
ANSWERS -2026 PREP
A heart murmur might be caused by
a) aortic valve insufficiency.
b) pulmonic valve insufficiency.
c) mitral valve insufficiency.
d) swirling of blood in the ventricle.
e) All of the answers are correct. - Correct Answer✓✓ e) All of the
answers are correct
An increase in the rate of action potentials from baroreceptors will
trigger a reflex to
a) decrease in blood pressure.
b) decrease in heart rate.
c) increase in heart rate.
d) both decrease heart rate and decrease pressure.
e) both increase heart rate and increase pressure. - Correct Answer✓✓
d) both decrease heart rate and decrease pressure
Blood flowing in the vena cava will next enter the __________.
a) left ventricle
, 2
b) right ventricle
c) left atrium
d) right atrium - Correct Answer✓✓ d) right atrium
Blood is supplied to the left atrium by the
a) phrenic arteries.
b) right coronary artery.
c) brachiocephalic artery.
d) left coronary artery.
e) pulmonary arteries. - Correct Answer✓✓ d) left coronary artery
Blood is supplied to the myocardium by
a) the coronary sinus.
b) contact with blood in the pumping chambers.
c) the coronary arteries.
d) arteries that branch off the subclavian arteries.
e) arteries that branch from the pulmonary arteries. - Correct
Answer✓✓ c) coronary arteries
Blood returning to the heart from the pulmonary circuit first enters
the __________.
a) pulmonary valve
b) left atrium
, 3
c) pulmonary trunk
d) right atrium - Correct Answer✓✓ b) left atrium
Blood returning to the heart from the systemic circuit first enters the
a) conus arteriosus.
b) left atrium.
c) left ventricle.
d) right ventricle.
e) right atrium. - Correct Answer✓✓ e) right atrium
Cardiac muscle cells and skeletal muscle cells differ in a few ways.
Which of the following is not one of them?
a) Cardiac muscle cells branch.
b) Skeletal muscle cells lack intercalated discs.
c) Cardiac muscle cells are smaller in size.
d) Cardiac muscle cells have a single, centered nucleus.
e) Cardiac muscle cells lack transverse tubules. - Correct Answer✓✓ e)
Cardiac muscle cells lack transverse tubules.
Depolarization of the ventricles is represented on an
electrocardiogram by the
a) QRS complex.
b) S wave.
