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Flashcards in phys6final16 Deck (14):
1

Cells in the stomach:

Subject Heading

2

Goblet Cells (surface mucous cells):

Protective barrier. Prevents digestion of stomach wall.

3

Mucous neck cells:

Secrete mucus that aids in absorption.

4

Parietal cells:

secrete hydrochloric acid that kills microbes & converts pepsinogen to pepsin (stomach enzyme) & intrinsic factor needed for absorption of B12.

5

chief cells:

secrete pepsinogen that is converted to pepsin to break down proteins and gastric lipase that helps split triglycerides

6

Gastrin (G) cells:

secrete gastrin that stimulates parietal cells to secrete hydrochloric acid and chief cells to secrete pepsinogen.

stomach emptied food into small intestine within 2 - 4 hours.

G : Barrier
P: HcL
C...Pepsinogen
G...Gastric

7

Small Intestine

Subject Heading

8

Two Movements:

Segmentation & peristalsis - controlled by myenteric plexus

9

Migrating Motility Complex (MMC):

type of peristalsis happens in small intestine.
Digestion completion happens when pandcreatic juice, bile & intestinal juice in small intestine.
Carbohydrates remainders (glycogen & starches) are broken down in small intestine by pancreatic amylase.

10

Dexatrinase:

Brush border enzyme - acts on cellulose

11

What is cellulose:

Sugar group. Destination: storage

12

Sucrase:

In intestinal juice splits sugar/sucrose into glucose & fructose. The 2 being absorbed in portal circulation.

13

Lactase:

intestinal sugar-splitting enzyme converting lactose to dextrose & galactose

14

Maltase:

Salivary & pancreatic enzyme acts on maltose converting it to glucose.