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BIO 220 Topic 2 Graded Quiz Latest
BIO 220 Topic 2 Graded Quiz Latest
All cardiac veins empty into the ________, which then empties into the ______.
a. coronary sinus; left atrium
b. coronary sinus; right atrium
c. great cardiac vein; right atrium
d. great cardiac vein; superior vena cava
e. inferior vena cava; left atrium
A stab wound into the heart can result in cardiac tamponade. This means that
a. blood enters the pleural cavity.
b. the heart is compressed by blood in the pericardial sac.
c. the electrical conduction system of the heart is damaged.
d. the left coronary artery has been damaged or cut.
e. the heart has lost all of its blood.
Which vessels empty blood into the left atrium?
b. right atrium
c. pulmonary trunk
d. pulmonary arteries
e. pulmonary veins
The right side of the heart receives blood from the body and pumps through _________ circulation to the
The volume of blood pumped during each cardiac cycle is the
a. stroke volume.
b. cardiac output.
c. cardiac reserve.
d. end-systolic volume.
e. end-diastolic volume.
The figure illustrates the cardiac action potential. What does “B” represent?
a. early repolarization phase
c. final repolarization phase
d. depolarization phase
Which of the following heart chambers is ly associated with the blood vessel that enters or leaves it?
a. right atrium – pulmonary veins
b. left atrium – aorta
c. right ventricle – pulmonary trunk
d. left ventricle – superior vena cava and inferior vena cava
e. right atrium – aorta
What vessel exits the left ventricle?
a. pulmonary trunk
b. pulmonary vein
d. pulmonary artery
What is the importance of the delay in the action potential in the AV node?
a. It allows the action potential to reach both ventricles at the same time.
b. It allows an action potential to reach the left atrium so both atria contract together.
c. It slows the rate of contraction of the ventricles.
d. It allows time for the atria to be filled with blood.
Chemoreceptors sensitive to blood oxygen levels are primarily located in the
b. carotid arteries.
c. right atrium.
d. left ventricle.
e. jugular veins.
The chordae tendineae
a. connect the atria to the ventricles.
b. are found in the interventricular septum.
c. are part of the conducting system of the heart.
d. connect the flaps of the AV valves to the papillary muscles.
e. are a part of the myocardium.
Which of the following factors would cause an increase in heart rate?
a. increased parasympathetic stimulation
b. stimulation of baroreceptors in the aorta
c. increased epinephrine release from the adrenal medulla
d. increased production of atrial natriuretic factor
e. vagal stimulation
Another name for the visceral pericardium is the
Aortic stenosis results from
a. a hole in the interatrial septum.
b. a weakening of heart muscle.
c. a narrowed opening through the aortic valve.
d. low oxygen levels.
e. leakage from the AV valves.
The valve located between the right ventricle and the pulmonary trunk is the
a. aortic semilunar valve.
b. pulmonary semilunar valve.
c. tricuspid valve.
d. mitral valve.
e. bicuspid valve.
The period of time in which the myocardium is insensitive to further stimulation is called the
a. absolute refractory period.
b. hyperpolarization period.
c. AV period.
d. SA period.
e. ectopic focus.
e. visceral pericardium
Which of the following is mismatched?
a. opening of sodium channels – depolarization
b. closing of calcium channels – plateau phase
c. opening of potassium channels – rapid repolarization
d. closure of sodium channels – early repolarization
e. opening of calcium channels – plateau phase
When a pacemaker potential in the SA node reaches threshold,
a. the permeability to K+ ions increases.
b. many voltage-gated Ca2+ channels open.
c. voltage-gated Ca2+ channels close.
d. RMP has been restored.
e. permeability of the cell does not change.
Blood does not enter or leave the ventricles during the period called
b. rapid filling.
d. isovolumetric contraction.
e. active and passive filling.