Class 9: Digestive System Flashcards Preview

Western Medicine > Class 9: Digestive System > Flashcards

Flashcards in Class 9: Digestive System Deck (85)
Loading flashcards...
1

most absorption takes place in the

SI

2

name the two anatomical subdivisions of the digestive system

-digestive tract (alimentary canal)
-accessory organs

3

GI tract is lined with

lumen

4

within the lumen, the lining is made up of ...

stratified squamous epithelium

5

middle layer of GI tract is composed of...

smooth muscle

6

nervous system for the GI tract...

enteric nervous system-controlled by medulla oblongata

7

serosa is...

the tough fibrous wrapping around the GI tract

8

smooth muscle (muscularis externa) is responsible for...

peristalsis

9

which plexuses go to the enteric nervous system?

-submucosal
-mysenteric

10

Auerbach plexus is...

the nerves innervating the esophogus, stomach, and intestine

11

auerbach plexus is connected to which part of the brain?

medulla oblongata

12

the enteric nervous system functions completely dependently/independently of the cns

independently

13

Autonomic nervous system exerts a significant influence on the...

enteric nervous system

14

motility and secretion of the digestive tract are controlled by

neural, hormonal, and paracrine mechanisms

15

neural control- 2 types of reflexes

short, long

16

hormones of digestive tracts

gastrin and secretin

17

chemical messengers are secreted into the bloodstream and stimulate distant parts of the

digestive tract

18

paracrine secretions are...

prostaglandins with a local effect

19

components of saliva

salivary amylase, lingual lipase, mucus, lysozyme, immunoglobulin A, elecrolytes

20

salivary amylase function

breaks down starches in the mouth

21

lingual lipase function...

enzyme that is activated by stomach acid and digests fat after the food is swallowed

22

mucus function

binds and lubricates the mass of food and aids in swallowing

23

lysozyme function

enzyme that kills bacteria

24

immunoglobulin A function

an antibody that inhibits bacterial growth

25

average pH of saliva

6.8-7.0

26

salivary gland in front of ear is called

parotid gland

27

what squirts saliva into the cheek?

parotid duct

28

pharynx is a...

muscular funnel that connects the oral cavity to the esophagus

29

the pharynx allows the entrance of air from the

nasal cavity to the larynx

30

esophogus is a...

straight muscular tube 25-30 cm long