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The Brachial Artery Is the Major Artery in Your Upper

Question 38

Multiple Choice

The brachial artery is the major artery in your upper arm. The figure below shows the blood pressure in the brachial artery of an average young adult, as it oscillates between the systolic pressure (120 mm Hg) and the diastolic pressure (75 mm Hg) .
The brachial artery is the major artery in your upper arm. The figure below shows the blood pressure in the brachial artery of an average young adult, as it oscillates between the systolic pressure (120 mm Hg)  and the diastolic pressure (75 mm Hg) .   Superimposed on the right side of the graph is a tracing of the pressure in the left ventricle, which drops to close to zero mm Hg during diastole. What prevents the blood pressure in the brachial artery from similarly dropping to almost zero during diastole? A)  Forceful closing of valves in the subclavian and brachial arteries propels the blood forward during diastole. B)  Recoil of elastic fibers in the aorta propels the blood forward during diastole. C)  Forceful closing of the aortic semilunar valve propels the blood forward during diastole. D)  Rhythmic contraction of smooth muscle tissue in the subclavian and brachial arteries propels the blood forward during diastole. E)  Inhaling and exhaling propels the blood forward during diastole. Superimposed on the right side of the graph is a tracing of the pressure in the left ventricle, which drops to close to zero mm Hg during diastole. What prevents the blood pressure in the brachial artery from similarly dropping to almost zero during diastole?


A) Forceful closing of valves in the subclavian and brachial arteries propels the blood forward during diastole.
B) Recoil of elastic fibers in the aorta propels the blood forward during diastole.
C) Forceful closing of the aortic semilunar valve propels the blood forward during diastole.
D) Rhythmic contraction of smooth muscle tissue in the subclavian and brachial arteries propels the blood forward during diastole.
E) Inhaling and exhaling propels the blood forward during diastole.

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