Digestive System 5

Question 0

Functions of microvilli

Answer 0

Absorption and digestion
Carb digestive enzymes
Protein digestive enzymes
Nucleotide digestive enzymes

Question 1

Important features of the small intestine mucosa are:

Answer 1

Circular folds
It's length 
Villi
Microvilli (absorptive epithelium)
Crypts (tubular glands)

Question 2

Enteroendocrine cell components

Answer 2

Are scattered within the epithelium. Sense local stimuli. Secrete hormones that regulate digestion.

Question 3

What does gastrin stimulate?

Answer 3

Gastric acid secretion

Question 4

Secretin stimulates

Answer 4

HCO3- (pancreas and liver)

Question 5

CCK stimulates

Answer 5

Pancreas and gall bladder

Question 6

Mucosal gland characteristics

Answer 6

Simple tubules
Openings lie between villi
Contain secretory cells
Contain stem cells (replace goblet and absorptive cells)

Question 7

Digestion from the GI tract into blood or lymph occurs by

Answer 7

Diffusion
Facilitated diffusion
Osmosis
Active transport

90% of all nutrient absorption occurs in the small intestine

Question 8

Absorption of water

Answer 8

Occurs by osmosis from the lumen of the intestines through epithelial cells and into blood capillaries.

Question 9

Subdivisions of the large intestine (colon)

Answer 9

Caecum
Colon
Rectum
Anal canal