GI I review deck

Question 1

where are the labial salivary glands?

Answer 1

submucosa of the inner lip

Question 2

what are the 2 “exceptions” in the mouth?

Answer 2

gingiva and hard palate

Question 3

what is different about gingiva and hard palate?

Answer 3

• keratinized
• dense CT in lamina propria
• lack submucosa (mucosa attaches directly to bone)

Question 4

what layer is absent in the ventral tongue?

Answer 4

submucosa

Question 5

what are the cell types that compose taste buds?

Answer 5

neuroepithelial- sensory
support cells
basal cells (stem cells)

Question 6

where are the taste buds located?

Answer 6

• lingual papilla: fungiform (dorsal), circumvaliate/foliate (lateral) also soft palate, pharynx and epiglottis

Question 7

describe enamel

Answer 7

covers crown, mostly hydroxyapetite, no collagen, made by ameloblasts

Question 8

describe dentin

Answer 8

bulk of tooth, contains pulp cavity and root cavity, hydroxyapetite and collagen I, made by odontoblasts

Question 9

describe cemetum

Answer 9

covers root, mineral/like bone but avascular, made by cementocytes

Question 10

what is intrinsic vs extrinsic GI innervation?

Answer 10

intrinisc- meissners and auerbachs

extrinsic- autonomics

Question 11

what is present in the lamina propria of the esophagus?

Answer 11

esophageal cardiac glands and lymph tissue

Question 12

what do esophageal cardiac glands secrete?

Answer 12

neutral mucus

Question 13

what is present in the submucosa of the esophagus?

Answer 13

esophageal glands

Question 14

what do esophageal glands secrete?

Answer 14

slightly acidic mucus

Question 15

what innervates von ebner’s glands?

Answer 15

parasympathetics from CN IX

Question 16

what does the periodontal ligament attach?

Answer 16

dentin to bone

Question 17

3 functions of mucosa

Answer 17

protect, absorb, secrete

Question 18

2 functions of muscularis externa

Answer 18

sphincters and peristalsis

Question 19

what is the outer covering of the esophagus?

Answer 19

mostly adventitia except for serosa on a small area below the diaphragm

Question 20

what is distinguishing about the GE junction (vs. recto-anal)?

Answer 20

muscular mucosa remains intact