Finale Review: Upper GI Flashcards
How is the epithelium distributed in the Gut Tract? How is muscle distributed?
Stratified, non-keratinized squamoud epithelium at either end (esophagus and anal canal). And simple columnar mucosa along the rest of its length.
Skeletal muscle is found at either end and smooth muscle along most of its length.
What layer does the enamel organ arise from?
Ectoderm
______ ____ forms the dental papilla which forms what three tissues?
Neural crest,
dentin
cementum
pulp
How many types of papillae does the tongue have?
FOUR
The filiform papillae lack _____ _____?
taste buds
Amelogenins and enamelins are unique to ?
enamel
Taste buds have _____ cells and taste cells
sustentacular
Taste cells have ______ microvilli with state receptors and release __________ from their basal membranes.
apical, neurotransmitters
Von Ebner’s Glands are _________ glands associated with _________ papillae
serous, circumvallate
What are the layers of the gut tube from inside to outside?
Mucosa
submucosa
external muscle layer
the serosa (adventitia)
The simple columnar epithelium, lamina propria, and muscularis interna are characteristic of what?
The mucosa
The external muscular layer is made up of an inner layer of _____ ______ and an outer layer of _____ ______.
circular smooth muscle, longitudinal muscle.
The submucosal plexus (Meissner’s plexus) is what?
a nerve plexus located between the submucosa and the circular muscle layer of the muscularis externa.
The myenteric plexus (of Auerbach) is what?
a nerve plexus located between the two layers of the muscularis externa.
What do the cardiac and plyloric regions of the stomach contain?
Mostly mucosa glands
