In order to remove a tumor in the muscular tunic of the stomach, a surgeon must cut through the
A. lamina propria.
B. submucosa.
C. serosa.
D. mucosa.
E. lamina propria.
C
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Which of the following vitamins is needed to promote muscle growth, and may reduce the risk of Parkinson's disease?
A) Vitamin K B) Vitamin E C) Vitamin C D) Vitamin D
Sucrose is hydrolyzed by sucrase into glucose and
A) glucose. B) lactose. C) fructose. D) maltose. E) galactose.
The opening and closing of the heart valves is caused by
A. contraction and relaxation of papillary muscles that pull on heart strings. B. pressure changes of alternating contraction and relaxation during the cardiac cycle. C. contraction of the smooth muscle in the walls of the great vessels leaving the heart. D. action potentials within the cusps of the valves.
What is the term for macrophages that have migrated to the skin?
A. Microglia B. Dendritic cells C. Mast cells D. Megaphagocytic cells E. Alveolar macrophages