题目内容

________ is the salivary gland near the ear.

A. Submandibular
B. Sublingual
C. Parotid
D. Tonsil

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________ refers to ring of muscle at the end of the stomach.

A. Pyloric sphincter
B. Uvula
C. Lower esophageal sphincter
D. Cardiac sphincter

________ refers to soft, inner section of a tooth.

A. Dentin
B. Enamel
C. Pulp
D. Gum

________ is the chemical that speeds up reactions and helps digest foods.

A. Triglyceride
B. Amino acid
C. Enzyme
D. Chyme

________ means pigment released with bile.

A. Glycogen
Bilirubin
C. Melena
D. Albino

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