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Where is the fossa ovalis?


A) left atrium
B) interatrial septum
C) right atrium
D) interventricular septum

Correct Answer

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Deoxygenated blood enters which side of the heart?


A) neither side
B) right side
C) left side
D) both sides

Correct Answer

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What are the first vessels to branch off of the base of the ascending aorta and penetrate the myocardium of the heart wall?


A) anterior interventricular artery
B) coronary arteries
C) cardiac veins
D) none of the above

Correct Answer

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The left coronary artery supplies blood to all the following EXCEPT ________.


A) interventricular septum
B) left ventricle
C) left atrium
D) right atrium

Correct Answer

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Which of the following is NOT part of the conducting system of the heart?


A) bundle of His
B) AV node
C) SA node
D) AV valve

Correct Answer

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D

Small muscle masses attached to the chordae tendineae are the ________.


A) trabeculae carnea
B) venae cavae
C) papillary muscles
D) pectinate muscles

Correct Answer

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When viewing a dissected sheep heart, it is easy to discern the right and left ventricles by ________.


A) locating the apex
B) tracing where the auricles connect
C) finding the papillary muscles
D) the thickness of the ventricle walls

Correct Answer

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The wall of the left ventricle is thicker than the right ventricle in order to ________.


A) pump blood with greater pressure
B) accommodate a greater volume of blood
C) pump blood through a smaller valve
D) expand the thoracic cage

Correct Answer

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What is the outermost layer of the heart?


A) endocardium
B) myocardium
C) epicardium
D) parietal pericardium

Correct Answer

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What is the deep groove between the right atrium and right ventricle that extends to the posterior surface?


A) anterior interventricular sulcus
B) posterior interventricular sulcus
C) coronary sulcus
D) none of the above

Correct Answer

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Which vessels collect deoxygenated blood from the myocardium?


A) atrial arteries
B) marginal arteries
C) coronary veins
D) coronary arteries

Correct Answer

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What is the serous membrane that surrounds the heart?


A) peritoneum
B) pleural cavity
C) pericardium
D) none of the above

Correct Answer

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The source of blood carried to the capillaries in the myocardium would be the ________.


A) coronary veins
B) coronary arteries
C) fossa ovalis
D) coronary sinus

Correct Answer

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Select the correct statement about the heart valves.


A) Aortic and pulmonary valves control the blood flow into the heart.
B) The mitral valve separates the right atrium from the right ventricle.
C) The AV valves are supported by the chordae tendineae so that blood does not flow back into the atria during ventricular contraction.
D) The tricuspid valve separates the left atrium from the left ventricle.

Correct Answer

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C

Trace the order of electrical excitation of the heart.


A) AV node, SA node, AV bundle, bundle branches
B) SA node, AV bundle, AV node, bundle branches
C) SA node, AV node, AV bundle, bundle branches
D) none of the above

Correct Answer

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C

Cardiac muscle ________.


A) has more than one nuclei per cell
B) has gap junctions and intercalated discs
C) lacks striations
D) none of the above

Correct Answer

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Which of the following statements is correct about the structure of the heart wall?


A) The myocardium is the layer of the heart wall that contracts.
B) The heart chambers are lined by endomysium.
C) Connective tissue in the heart helps in conduction of the action potential.
D) The fibrous skeleton forms the bulk of the heart.

Correct Answer

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Blood within the pulmonary veins returns to the ________


A) right atrium
B) left atrium
C) right ventricle
D) left ventricle

Correct Answer

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What is the pacemaker of the heart?


A) AV node
B) bundle of His
C) Purkinje fibers
D) SA node

Correct Answer

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