GASTROINTESTINAL PHYSIOLOGY

Question 1

Four functions of GIT

Answer 1

Motility
Secretion
Digestion
Absorption

Question 2

Motility

Answer 2

Muscular contractions that mix and move forward content of the GIT.

Question 3

Two types of digestive motility

Answer 3

Propulsive movements
Mixing movements

Question 4

Propulsive movements

Answer 4

Push forward the content of the GIT

Question 5

Mixing movements

Answer 5

Mixing food with digestive juices to promote digestion.
Facilitates absorption by exposing all parts of the GIT content to absorption surfaces of the GIT

Question 6

Secretion

Answer 6

Secretion of enzymes, electrolytes, bile and mucous into the digestive tract lumen

Question 7

What happens to the secretions after digestion has taken place?

Answer 7

They are re absorbed into the blood.

Question 8

Digestion

Answer 8

Biochemical breakdown of food into smaller units

Question 9

Absorption

Answer 9

small units resulting from digestions, along with water, vitamins and electrolyte transferred from digestive tract lumen to blood or lymph

Question 10

Where does most absorption take place?

Answer 10

Small intestine