102b Upper GI

Question 1

what separates the oropharynx from the nasopharynx? larynogopharynx and oropharynx?
laryngopharynx and esophagus?

Answer 1

soft palate
top of epiglottis
laryngeal cartilage

Question 2

histology of pharynx and esophagus?

Answer 2

nonkeratinized stratified squamous epithelium

Question 3

what does the nasal and oral cavities develop from? phyranx, airway, esophagus?

Answer 3

stomodeum

foregut

Question 4

layers of the gut wall (in to out)

Answer 4

(MSMS)
Mucosa
Submucosa (glands, ct, and Meissner’s plexus)
Muscularis externa (Auerbach’s plexus for peristalsis)
Serosa/Adventitia

Question 5

features of the small intestine

Answer 5

villi and plica

Question 6

features of the large intestine

Answer 6

smooth surface and crypts (tubular glands)

Question 7

parts of the mucosa layer

Answer 7

simple columnar epithelium - absorption
lamina propria - support (loose ct)
muscularis musosae - motility (smooth muscle)
glands and lymphatic tissue

Question 8

sublingual vs parotid vs submandibular glands

Answer 8

sublingual are mostly mucous (lighter stain)
parotid are serous (darker stain)
submandibular have both

Question 9

tonsils - what are they and where?

Answer 9

what - aggregations of lymphatic nodules

1) pharyngeal (adenoids) - roof of nasopharynx
2) palatine (w/ crypts) - back of mouth/oropharynx?
3) lingual - on pharynx part of tongue

Question 10

type of muscle in esophagus?

Answer 10

top 1/3 - striated
middle 1/3 - mixed
bottom 1/3 - smooth

Question 11

esophagus - innervation

Answer 11

visceral sensory and parasympathetics - vagus nerve (recurrent laryngeal nerves for striated muscle)
sympathetic/splanchnic for arteries