Question

Cephalexin phase of gastric secretion is meadedt by

Answer 1

Answer:

There are mainly 4 phases of gastric secretion :

1. Cephalic phase
2. Gastric phase
3. Intestinal phase
4. Interdigestive phase

The question wants to know the mediator of the cephalic phase of gastric acid secretion.

This phase is mediated by vagus nerve which brings impulses from the brain via unconditioned and conditioned reflexes.

Unconditioned reflexes are elicited by food present in mouth by act of mastication and deglutition.

Conditioned reflexes are elicited by slight smell odd even thought of food. It was first proved by scientist Pavlov in his classical experiment with dogs.

Vagus nerve stimulation during this phase leads to stimulation of G cells of the stomach which in turn leads to to gastric secretion.

Answer 2

Answer:

$Effects on gastric secretion The cephalic phase induces ECL cells in the gastric glands to secrete histamine and increase HCl in the stomach. There will also be an influence on G cells to increase gastrin circulation. It will also stimulate Chief cells to release Pepsinogen.$