The products of digested food are present in the ileum. Which substances enter a blood capillary and a lacteal in a villus?

Correct Answer: A

Rationale: Amino acids and glucose enter the blood capillaries, while fatty acids and glycerol are absorbed into the lacteals.

Correct Answer: D

Rationale: Peristalsis refers to the rhythmic contractions of smooth muscle that propel food and chyme through the digestive tract.

Correct Answer: B

Rationale: Humans have three pairs of salivary glands (parotid, submandibular, sublingual) that produce saliva containing amylase; not five as originally asserted.

Correct Answer: C

Rationale: Assimilation involves distributing absorbed nutrients to body cells for use.

Correct Answer: C

Rationale: The lamina propria of the hard palate is directly continuous with the periosteum of the underlying bone, providing a firm attachment. Loose areolar tissue is more typical in softer mucosal areas.