In mitral valve prolapse, the mitral valve
A) is missing as a result of abnormal development.
B) bulges into the left atrium during ventricular contraction.
C) has an extra cusp.
D) bulges into the left atrium during ventricular relaxation.
B
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Which layer(s) of the wall of the GI tract contain a nerve plexus?
A. Mucosa and adventitia/serosa B. Submucosa and muscularis C. Muscularis D. Mucosa and muscularis E. Adventitia/serosa
_______ removes hydrogens
Fill in the blank(s) with the appropriate word(s).
Estrogens are responsible for:
A) increased erythrocyte production. B) adipose tissue deposits in the breasts, hips, and thighs. C) deepening of the voice. D) increased skeletal muscle mass.
In the digestive and urinary systems, rings of smooth muscle, called ________, regulate the movement of materials along internal passageways
A) circular muscles B) longitudinal muscles C) muscularis mucosae D) sphincters E) the muscular layer