The thymus is
A. larger in children.
B. larger in adults.
C. the same size in adults and children.
Answer: A
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The erythrocyte count increases after a while when an individual goes from a low to a high altitude because the ________.
A) temperature is lower at higher altitudes B) basal metabolic rate is higher at high altitudes C) concentration of oxygen and/or total atmospheric pressure is higher at higher altitudes D) concentration of oxygen and/or total atmospheric pressure is lower at high altitudes
Which of the following drugs would be an effective means for lowering plasma cholesterol levels?
A) a drug that stimulates intestinal cholesterol transport B) a drug that stimulates the enzyme HMG coA reductase C) a drug that adds plant sterols and stanols to the diet D) a drug that binds to bile acids and prevents them from being reabsorbed or a drug that adds plant sterols and stanols to the diet E) a drug that binds to bile acids and prevents them from being reabsorbed
Match the term with the appropriate description.A. Lipids that cause smooth muscle relaxation and vasodilationB. Lymph nodules aggregated in the small intestinal wallC. Rounded epithelial structures found in the medulla of thymusD. Areas of a lymph node where lymphocytes divideE. A chemical released from mast cells that causes vasodilationProstaglandins
Fill in the blank(s) with the appropriate word(s).
Which of the following statements regarding leukocytes is TRUE?
A. Leukocytes have no nucleus. B. Leukocytes play a role in oxygen transport. C. Leukocytes are the largest of the formed elements. D. Leukocytes are only fragments of cells. E. There is only one kind of leukocyte.