GI Secretions

Question 1

lubrication and protection of all parts of the alimentary tract.

Answer 1

mucus

Question 2

Function of Enteric Nervous Stimuli

Answer 2

Contact of Food with the Epithelium Stimulates Secretion

Question 3

Increases the Alimen tary Tract Glandular Secretion Rate.

Answer 3

I Parasympathetic Stimulation

Question 4

sympathetic stimulation also results in constriction of the blood vessels that supply the glands.

T or F

Answer 4

True

Question 5

Sympathetic Stimulation Has a Dual Effect

Answer 5

1. Increases secretion
2. reduces the secretion, sometimes significantly so, mainly because of vasoconstrictive reduction of the blood supply if para sympathetic is causing copious secretion by the glands

Question 6

nervous stimulation does not cause water and salts to pass through the glandular cells in great profusion, washing the organic substances through the secretory border of the cells at the same time

Answer 6

False. It causes.

Question 7

thick secretion composed mainly of water, elec-trolytes, and a mixture of several glycoproteins

Answer 7

Mucus

Question 8

Mucus properties:

Answer 8

1. Adherent
2. Sufficient body
3. Anti-slippage
4. Fecal adherence
5. Resistant to enzymes
6. Amphoteric buffer

Question 9

Daily secretion of saliva normal range

Answer 9

800-1500 mL

Ave. 1L

Question 10

Serous and mucus secretion of saliva

Answer 10

Serous- ptyalin (α-amylase), which is an enzyme for digesting starches)

Mucus- mucin for lubricating and for surface protective purposes.