The dicrotic notch in the aortic pressure curve is due to the
A. increase in intraventricular pressure during ejection.
B. backflow of blood toward the ventricles.
C. closure of the left AV valve.
D. elasticity of the arterial wall.
E. closure of the semilunar valves.
B
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Indicate whether the statement is true or false
Vickie has a tumor that secretes excess amounts of the hormone aldosterone. Because of the elevated level of hormone, she exhibits
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The thymus gland is typically ________ in children than adults, and is involved in the maturation of _________.
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