Gastrointestinal Lecture 1 Part 2 General Overview

Question 1

Functions of gastrointestinal physiology

Answer 1

• Motility
• Digestion
• Absorption
• Secretion

Question 2

Motility refers to …?

Answer 2

Motility refers to the movements of the gastrointestinal tract

Question 3

What is the 2 purposes of motility?

Answer 3

1. Moves contents from the mouth to the anus
2. Mixes contents to facilitate digestion and absorption

Question 4

Digestion

Answer 4

process of breaking down large particles of food and high-molecular weight substances into small molecules

• Breaking down molecules into building block so they can be absorbed; digestion primarily occurs in stomach and small intestine and absorption mostly happens in small intestine

Question 5

Where does digestion primarily happen?

Answer 5

stomach and small intestine

Question 6

Absorption

Answer 6

movement of the products of digestion across the intestinal epithelium into the body

• circulation moves around to supply body

Question 7

Secretion

Answer 7

Release of substances into the lumen of the gastrointesintal tract, which facilitate digestion, absorption and motility

• occurs all along GI tract

Question 8

How are function of GI interdependant?

Answer 8

optimizes absorption