Lecture 24 and 25

Question 1

The sympathtic nervous system stimulates

Answer 1

Motility and secretion

Question 2

The sympathetic nervous system ____ motility and secretion

Answer 2

Inhibits

Question 3

The central nervous system modulates activity of the ______

Answer 3

Enteric nervous system

Question 4

The ENS consists of the submucosal plexus and myenteric plexus which…..

Answer 4

Regulate motility

Question 5

The enteric nervous system is involved in

Answer 5

Peristalsis and segmentation

Question 6

Critical hormones in the GI are

Answer 6

• Gastrin
• CCK
• GIP
• Secretin

Question 7

Storage of food is located in the

Answer 7

Fundus and body of the stomach

Question 8

Mechanical digestion occurs in the…

Answer 8

Antrum

Question 9

Controlled delivery to the duodenum occurs in thee

Answer 9

Pyloric sphincter

Question 10

What is retropulsion

Answer 10

A combination of peristalsis and the closure of the pyloric sphincter

Question 11

How does pepsinogen become activated?

Answer 11

It is converted to the active form pepsin, by acid.

Question 12

Gastric acid will…

Answer 12

• Dilute food
• Denature proteins
• Activate pepsinogen to pepsin and
• Create optimum pH for pepsin action

Question 13

What three phases is gastric secretion divided into?

Answer 13

• Celicac phase
• Gastric phase
• intestinal phse

Question 14

During the cephalic phase, which cells are stimulated?

Answer 14

The ENS stimulated parietal, cheif and goblet cells.

Question 15

Which hormone is stimulated during the cephalic phase?

Answer 15

Gastrin

Question 16

During the gastric phase, , pH _____

Answer 16

Is elevated.

Question 17

During the intestinal phase, which organ regulates secretion

Answer 17

The small intestine

Question 18

Which hormones will inhibit chief cells and parietal cells during the intestinal phase?

Answer 18

GIP, CCK and secretin.

Question 19

What does alkaline fluid do?

Answer 19

Neutralizes acid and makes an optimum pH for enzymes.

Question 20

Stimulation of secretion of digestive enzymes by acinar cells stimulated by

Answer 20

CCK