MNT 2

Question 1

What are the 3 phases of gastric secretion?

Answer 1

Vagus nerve (cranial nerve X) fibers in medulla stimulate the PNS of the stomach.

1.Cephalic- (20%)sight, smell, taste, thought of food// sensory and mental input

2.Gastric- (50-60%) Food activates activity by stretching receptors

3.Intestinal- (5-10%) duodenum enhances acid secretion but soon inhibits.

Question 2

HCL, Gastrin, Somatostatin, and Ghrelin are produced where and do what?

Answer 2

HCL: parietal cells-activates pepsin, kills microorganisms, denatures PRO

Gastrin: G cells- stimulates acid release, muscle contractions, and growth of stomach lining

Somatostatin: Gastric D cells- inhibits gastrin and released upon stomach emptying or pH too high

Ghrelin: Enteroendocrine cells- stimulate appetite and promote fat storage, stimulates growth hormone from pituitary

Question 3

What are some of the stomach’s defense systems?

Answer 3

• Expansion to 4L
• Mucosa coating
• Tight cellular junctions
• Pepsin and HCL by acid and pH
• Prostoglandins

Question 4

What is gastroparesis?
Accompanied with erratic blood glucose think about it..

Answer 4

Delayed stomach emptying related to slow or little to no stomach contactions. Can be caused. By inadequate blood flow to stomach during digestion, nerve damage (drugs/ surgery), physical alterations. Nitric oxide synthase is necessary in enteric nerve to relax the pylorus

Question 5

A high CRP in lab work could mean?

Answer 5

An inflammatory response in the body