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Vitale

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p.2

Which vessel type is primarily responsible for material exchange between blood and tissues?

A. Capillaries
B. Veins
C. Arteries
D. Arterioles
E. Venae cavae

Select an answer

p.2

Explanation

Capillaries have thin walls allowing diffusion of gases and nutrients to tissues; arteries and veins are mainly conductive.

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1 / 34
p.2

Which vessel type is primarily responsible for material exchange between blood and tissues?

A

p.3

What property of hemoglobin explains progressive O2 release along capillaries?

C

p.4

Which factor increases resistance to blood flow the most?

D

p.4

Why do veins in the lower limbs lie between muscle layers?

B

p.4

Which statement about the pulmonary circulation is correct?

A

p.12

Which layers form the heart wall from outermost to innermost?

B

p.12

What histological feature allows rapid electrical spread between cardiac myocytes?

A

p.16

Which statement about the pericardium is FALSE?

D

p.7

What contributes most to blood progression during diastole?

C

p.10

Cardiac output (CO) is given by which formula?

B

p.10

Which adaptation is typical of endurance training?

A

p.25

Which coronary artery typically supplies the anterior two-thirds of the interventricular septum?

C

p.25

Origin of the right coronary artery is from which aortic sinus?

B

p.49

Which structure is responsible for delaying conduction between atria and ventricles?

A

p.31

Which statement about interatrial communications in fetal life is correct?

C

p.34

What prevents atrioventricular valve prolapse during systole?

A

p.25

Which groove divides the atria from the ventricles externally?

B

p.25

Which vessel collects most venous blood from the heart and drains into the right atrium?

D

p.19

Which chamber forms most of the posterior surface (base) of the heart?

C

p.36

The moderator band in the right ventricle contains which important fibers?

B

p.34

During which phase are semilunar valves closed and AV valves open?

B

p.27

Which embryonic structure gives rise to the right ventricle?

D

p.48

Which conduction tissue is the primary physiological pacemaker?

A

p.37

What is the typical thickness of the left ventricular wall in adults?

C

p.35

Which structure lies in the triangle of Koch and is clinically significant?

D

p.49

During which part of the cardiac cycle do papillary muscles contract relative to ventricular myocardium?

A

p.35

What is the clinical consequence of an open foramen ovale (persistent atrial communication)?

C

p.46

Which cells have unstable resting potentials producing pacemaker potentials?

D

p.39

Why is the origin of coronary arteries located just above the aortic valve?

A

p.50

Channelopathies primarily affect which aspect of cardiac function?

B

p.22

Which nerve provides sensory innervation to the pericardium and can cause referred pain to the shoulder?

C

p.45

What is the effect of sympathetic stimulation on heart function?

A

p.8

Which of the following best explains why small arteries regulate regional blood flow?

B

p.20

Where does the apex of the heart project on the chest surface?

D

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Study Smarter, Not Harder