Reflux of gastric contents into the esophagus occurs because of
A. relaxation of the cardiac sphincter.
B. contraction of the pyloric sphincter.
C. spasms of the submucosal layer of the stomach wall.
D. increased hydrochloric acid production by the parietal cells.
E. increased amounts of mucous produced by the stomach.
A
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A. Masseter B. Buccinator C. Medial pterygoid D. Temporalis E. Lateral pterygoid
Which of the following enzymes is not produced by the pancreas?
A) alpha-amylase B) rennin C) lipase D) nucleases E) peptidases
Each auricular surface of the sacrum is located on a(n)
A. ala. B. median sacral crest. C. sacral cornu. D. apex. E. spinous process.
The part of the hair that extends beyond the skin surface is called the
A. bulb. B. alopecia. C. papilla. D. shaft. E. root.