Gut L1 Flashcards
what is the function of the mucous neck cell?
- secretes mucus
what is the function of the surface mucous cell?
secretes mucus
what is the function of the parietal cell?
secretes HCl and intrinsic factor
what is the function of the chief cell?
secretes pepsinogen
what is the function of the
G cell?
secretes hormone GASTRIN
what is the length of the small intestine
6m
where is the submucosal plexus located?
between circular muscle and sub mucosa
- controls SECRETION by GI tract
- main sensory neuron for SECRETION is CHEMORECEPTORS
where is the myenteric plexus located
the main sensory neuron for motility is what
between the 2 muscle layers
- controls MOTILITY, FREQ and STRENGTH of GI tract contraction
- the main sensory neuron for motility is DISTENSION
what is the role of Brunner’s gland
where is it
bicarbonate sectretion
in the jejunum
what is the effect of coeliacs disease
- low in microvilli O less absorption (20x)
Crohns disease can lead to what
short bowel syndrome if some of the bowel is surgicallly removed O not enough s.a to absorb nutriets
describe the duodenum
the duodenum is how much
the first 12cm of s. i
- has a high vol of food
- high conc of nutrients
- highly vascularised O appears red
- cont Brunner’s glands
- cont plicae (additional folding)
describe the jejunum
- cont Brunners glands
- highly vascularised O dark appearabce
- long villi, large s.a
describe the ileum
- part of s.i that joins to l. int
- paler appearance
- Peyer’s patches (lymphatics)
- short villi O smaller s.a
enterocytes are what type of cell?
absorbative cells