Describe the processes of fat and protein digestion and product absorption as they occur in the human stomach and small intestine. Include a discussion of the enzymatic reactions involved.

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Describe the processes of fat and protein digestion and product absorption as they occur in the human stomach and small intestine. Include a discussion of the enzymatic reactions involved.




1. Stomach:
Region- Cardiac and pyloric sphincter
Layers of muscle and thick walls
Digestive Function:
a) Chief cells secretes renin, lipase, and pepsinogen
b) Parietal cells Secretes HCL
c) mucus protects stomach

Endocrine Function:
Gastrin Function: stimulates production of digestive juices
Presence of food: stimulus for gastrin release

2. Small Intestine:
Contains villi which are blood vessels
Region: duodenum
Digestive Function:
3 enzymes= lipase, amylase, nuclease
Function: Bile= produced in liver, stored in gall bladder, emulsifier

Endocrine Function: Stimulates release of alkaline secretions by pancreas, stimulates gallbladder to release bile, stimulates pancreas to secrete digestive enzymes.

3. Pancreas:
Connects to small intes. by pancreatic duct
made up of exocrine and endocrine cells

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