[RECALLS] PRELIMS - Topic 30: Gastric & Salivary Digestion (By: Dr. Ea Guiani)

Question 1

Monosaccharides

Answer 1

CHO

Question 2

Amino acids

Answer 2

CHON

Question 3

Monoacylglycerol

Answer 3

Fats

Question 4

Fatty acids

Answer 4

Fats

Question 5

Glycerol

Answer 5

Fats

Question 6

Hormones that aid and regulate the digestive system:

a. gastrin
b. secretin
c. CCK
d. GIP
e. all of the above
f. a & b

Answer 6

e. all of the above

Question 7

Water is greatly reabsorbed in which segment of the small and large intestine?

a. jejunum
b. ileum
c. duodenum
d. cecum
e. colon

Answer 7

a. jejunum

Question 8

Saliva has a resting pH of 6.4 – 6.9, and an active pH of 7.0 – 7.3

a. true
b. false

Answer 8

a. true

Question 9

Gland which produces a moderately viscous secretion and accounts for 70% content of saliva

a. gastric gland
b. parotid gland
c. submaxillary gland
d. sublingual gland

Answer 9

c. submaxillary gland

Question 10

Produced by von Ebner’s glands

a. pancreatic lipase
b. salivary amylase
c. lingual lipase
d. gastric lipase

Answer 10

c. lingual lipase

Question 11

Stimulates secretion of pepsinogen and HCl

Answer 11

Gastrin

Question 12

Signals secretion of sodium bicarbonate and bile in the liver.

Answer 12

GIP

Question 13

Signals release of digestive enzymes in pancreas

Answer 13

CCK

Question 14

Induce insulin secretion and decreases stomach churning

Answer 14

GIP

Question 15

Signals emptying of bile in gall baldder

Answer 15

CCK

Question 16

Has an excitatory and inhibitory phase

Answer 16

Intestinal phase

Question 17

Stimulates distention of the stomach, presence of food in stomach and increase in pH.

Answer 17

Gastric phase

Question 18

Occurs before food enters the mouth

Answer 18

Cephalic phase

Question 19

G cells release gastrin which stimulates parietal cells to release HCl

Answer 19

Gastric phase

Question 20

Taste and smell stimulus is sent to the hypothalamus and medulla oblongata.

Answer 20

Cephalic phase

Question 21

An endopeptidase secreted by the chief cells and activated by HCl.

a. pepsin
b. pepsinogen
c. Gastrin
d. Pancreatic lipase

Answer 21

b. pepsinogen

Question 22

Secreted by the parietal cells

a. secretin
b. Pepsin
c. HCl
d. pepsinogen

Answer 22

c. HCl

Question 23

Important in neonates with milk as substrate.

a. pancreatic lipase
b. salivary amylase
c. gastric lipase
d. ptyalin

Answer 23

c. gastric lipase

Question 24

Hydrochloric acid digestion barrier.

a. mucin
b. HCO3
c. tight junction between cells
d. all of the above

Answer 24

d. all of the above

Question 25

Parietal cells of the stomach also secrete a glycoprotein called intrinsic factor which enables the absorption of: a. vitamin D b. vitamin K c. Vitamin B12 d. Vitamin C

Answer 25

c. Vitamin B12

Question 26

Functions of bile: a. emulsification b. neutralization of acids c. lowers surface tension d. all of the above

Answer 26

d. all of the above

Question 27

Cholesterol and phosphatidylcholine are dissolved by bile salts in the form of: a. micelles b. measles c. missiles d. misses

Answer 27

a. micelles

Question 28

Most alkaline secretion of the human body stimulated by secretin, acetylcholine, and pancreozymin a. gastric juice b. salivary amylase c. pancreatic lipase d. pancreatic juice

Answer 28

d. pancreatic juice

Question 29

Amylase catalyzes the hydrolysis of starches acting on alpha 1-4 glycosidic bond a. true b. false

Answer 29

a. true

Question 30

Spared, not hydrolyzed linkages by amylase except: a. alpha 1-4 glycosidic link b. alpha 1:6 linkages c. terminal 1:4 linkages d. alpha 1:4 linkages next to the branching points

Answer 30

a. alpha 1-4 glycosidic link

Question 31

Glucose A. SLGT B. GLUT 5 C. Both

Answer 31

C. Both

Question 32

Galactose A. SLGT B. GLUT 5 C. Both

Answer 32

C. Both

Question 33

Fructose: A. SLGT B. GLUT 5 C. Both

Answer 33

B. Glut 5

Question 34

Sugar alcohols A. SLGT B. GLUT 5 C. Both

Answer 34

B. Glut 5

Question 35

Principal end products of carbohydrate digestion in the intestinal lumen a. alpha-limit dextrin b. maltotriose c. Maltose, lactose, sucrose d. All of the above

Answer 35

d. All of the above

Question 36

Major dietary lipids a. triacylglycerol b. triglycerides c. phospholipids d. all of the above

Answer 36

d. all of the above

Question 37

Digestion of nucleic acids: ribonuclease and deoxyribonuclease: a. true b. false

Answer 37

a. true

Question 38

Completes the digestion of amino acid: a. dipeptidases b. aminopeptidases c. none of the above

Answer 38

a. dipeptidases

Question 39

This mineral requires vitamin D for absorption, enhances permeability of mucosal cells and induces synthesis of calbindin: a. calcium b. iron c. biotin d. zinc

Answer 39

a. calcium

Question 40

This vitamin is enhanced by vitamin C and alcohol. It accumulates in the mucosal cells bound to ferritin, but goes out of the mucosal cells via transport protein ferropotin. a. calcium b. iron c. biotin d. zinc

Answer 40

b. iron