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Flashcards in Digestive System Deck (128)
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1

What is another name for the GI tract?

alimentary canal

2

List the main organs in the digestive system

mouth, pharynx, esophagus, stomach, small intestine, and large intestine

3

List the accessory digestive organs

teeth, tongue, gallbladder, salivary glands, liver, and pancreas

4

In order, what are the main stages in the digestive process?

1. ingestion
2. Mechanical breakdown
3. Propulsion
4. Digestion
5. Absorption
6. Defecation

5

Which step in the digestive process are swallowing and peristalsis apart?

Propulsion

6

Define peristalsis

alting waves of contraction and relaxation

7

Which 3 components constituent mechanical breakdown?

chewing, churning, and segmentation

8

What is segmentation?

rhythmic local constrictions of small intestine

9

Passage of digested end products from GI tract lumen into blood or lymph

Absorption

10

Elimination of indigestible substances

Defecation

11

What controls GI tract motility and secretion?

Enteric nervous system

12

What provokes digestive activity?

mechanical and chemical stimuli

13

When stimulated, receptors in GI tract walls initiate reflexes that...?

1. activate/inhibit digestive glands
2. stimulate smooth muscle

14

T or F. Controls of digestive activity are both intrinsic and extrinsic

True

15

What are the 2 neural mechanisms?

1. Short reflexes- GI tract
2. Long reflexes- CNS center and ANS fibers

16

Describe hormonal mechanisms.

involve hormone-producing cells in stomach and small intestine

17

What covers the abdomen?

peritoneum

18

What type of peritoneum covers the organs?

visceral peritoneum

19

What comes between visceral and parietal peritoneum?

peritoneal cavity

20

What type of peritoneum lines the abdominopelvic cavity?

parietal peritoneum

21

What is the double layer of peritoneum that extends to digestive organs from body wall?

mesentery

22

What are the 4 layers of the alimentary canal?

muscosa, submucosa, muscularis externa, and serosa

23

Which layer of the alimentary canal consist of epithelium, lamina propria, and muscularis externa?

Mucosa

24

Dense connective tissue; contains blood vessels, lymphatics, and nerve fibers

Submucosa

25

visceral peritoneum

serosa

26

Inner circular layer; outer longitudinal layer

Muscularis externa

27

Bounded by lips, cheeks, palate, and tongue; lines by stratified squamous epithelium

Mouth (oral cavity)

28

Bone in the oral cavity

hard palate

29

Skeletal muscle

soft palate

30

What projects from free edges in the mouth?

uvula