20 Digestive System P1

Question 1

What is the mucosa?

Answer 1

Epithelial lining closest to lumen

Question 2

What are the layers of the the alimentary canal?

Answer 2

Mucosa-epithelial lining where secretion and absorbtion take place
Submucosa-vascularized and innervated to carry away nutrients absorbed by mucosa
Muscularis-inner circular, outer longitudinal layers of muscle for segmentation and persistalsis
Serosa-visceral peritoneum

Question 3

What type of tissue are the lips made of?

Answer 3

non-keratinized stratified squamous epithelium

Question 4

what is the esophegeal hiatus?

Answer 4

Opening in the diaphragm that allows the passageway of the esophagus

Question 5

What is reflux esophagitis?

Answer 5

Heart burn

Question 6

What is the mucosa of the stomach made of?

Answer 6

Simple columnar epithelium

Question 7

What are the five different cells types present in the stomach mucosa?

Answer 7

1. Surface mucous–secrete mucin to protect stomach from acid
2. Mucus Neck cells–secrete acidic mucin
3. Parietal cells–secrete hydrochloric acid, Gastric Intrinsic factor
4. Chief Cells–secret pepsinogen (converted to pepsin by acid)
5. Enteroendocrine cells–secret hormones, gastrin and somatostatin

Question 8

What does Gastric Intrinsic Factor do?

Answer 8

Binds to vitamin B12 to assist in B12 absorbtion

Question 9

What does hyposecretion of GIF lead to?

Answer 9

Pernicious Anemia

Question 10

How many deciduous or primary teeth?

Answer 10

20-
8 incisors
4 canines
8 premolars/bicuspids

Question 11

How many permanent teeth?

Answer 11

32-
8 incisors
4 canines
8 premolars/bicuspids
12 molars

Question 12

Rank salival glands according to their relative release of saliva

Answer 12

Submandibular (60-70%)
Parotid (25-30%)
Sublingual (3-5%)