Anatomy and Physiology

Seite 1

Digestive- Metabolism and development

Food breakdown-stomach:

gastric juice regulated by nerves and hormones

when food is present of pH levels are falling gastrin will release

gastrin causes stomach glands produce protein-digesting enzymes

hydrochloric acid makes stomach very acidic which

activates pepsinogen to pepsin for protein digestion

provides a hostile environment for microorganisms

Digestion and Absorption:

types of protein digestion enzymes:

pepsin: an active protein digesting enzyme

Rennin: works on digesting milk protein

the only things that are absorbed in stomach are alcohol and aspirin

stomach empties every four to six hrs.

Digestion in the small Intestine:

Enzymes from the brush border

Break double sugars into simple sugars

complete some protein digestion

Pancreatic Enzymes

complete digestion of starch

Carry out Hal of protein digestion

Responsible for digestion

Digest nuclei acids

Alkaline content neutralizes acidic chyme

Seite 2

Stimulation of Pancreatic Juice:

Vagus Nerve

Local Hormones

Secretin