Small Intestine

Question 1

Small Intestine

Answer 1

Major site of digestion and absorption of nutrients and water in the digestive canal.

Question 2

Intestinal glands function

Answer 2

Secrete intestinal juice to assist absorption

Question 3

absorpative cells function

Answer 3

Digest and absorb nutrients

Question 4

Paneth cells function

Answer 4

Secrete lysozyme (bactericidal enzyme), and phagocytosis.

Question 5

Duodenal glands function

Answer 5

Secrete alkaline fluid to buffer stomach acids and mucus for protection and lubrication.

Question 6

Circular folds

Answer 6

Folds of mucosa and submucosa that increase surface area for digestion and absorption.

Question 7

Intestinal villi

Answer 7

Fingerlike projections of mucosa that are sites of absorption of digested food and increase surface area for digestion and absorption

Question 8

Microvilli

Answer 8

Microscopic, membrane-covered projections of absorptive epithelial
cells that contain microvillous border enzymes (listed in Table 24.5)
and increase surface area for digestion and absorption

Question 9

Segmentation is a type of peristalsis

Answer 9

alternating contractions of circular smooth
muscle fibers that produce segmentation and resegmentation of
sections of small intestine; mixes chyme with digestive juices
and brings food into contact with mucosa for absorption.

Question 10

Migrating motility complex (MMC)

Answer 10

Type of peristalsis: waves of contraction and relaxation of circular and longitudinal smooth muscle fibers passing the length of the small intestine; moves chyme toward ileal orifice

Question 11

Salivary amylase

Answer 11

source: salivary glands
Substrates- starches

Question 12

Gastric juice enzymes

Answer 12

Pepsin
Gastric lipase

Question 13

Products of gastric enzymes pepsin and gastric lipase

Answer 13

Pepsin- peptides

Gastric lipase- fatty acids and monoglycerides