The first recognizable feature of the cardiovascular system is (the)
A) heartbeat at birth.
B) formation of blood cells in the liver.
C) heartbeat at five months.
D) development of the aorta at two months.
E) None of the answers are correct
E) None of the answers are correct
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A genetic condition that leads to the inability to absorb and recycle cholesterol in the liver is
A) focal calcification. B) familial hypercholesterolemia. C) atherosclerosis. D) arteriosclerosis. E) coronary artery disease.
Clonal selection of T cells happens in the thymus.
Answer the following statement true (T) or false (F)
At rest, the tropomyosin molecule is held in place by
A) actin molecules. B) myosin molecules. C) troponin molecules. D) ATP molecules. E) calcium ions.
The bulge under the mandible is the ________ gland, which is found in the ________ triangle. (Same word for both blanks).
Fill in the blank(s) with the appropriate word(s).