Mouth and regulation Flashcards
2 types of saliva glands
acinar
ductal
2 types of acinar saliva cells. what do they secrete/reabsorb
serous
-secretes water, ions and enzymes
mucous
-secretes mucous
Ductal saliva cells function
secrete ..
and absorb..
-changes the ion concentration in saliva
-reabsorbes Na and Cl
-Secretes K and HCO3
saliva secretion - unconditioned response
what stimulates
pressure in mouth stimulates secretion
saliva secretion - conditioned response
what stimulates
association w neutral stimulus
-smell, sight
2 phases of swallowing
- Oropharyngeal phase
- Esophageal phase
2 sphincters of swallowing
Pharyngoesophageal
Gastroesophageal
2 gastric surface areas of stomach
-areas they are located
oxyntic mucosa
-in the fundus and body
pyloric gland area
- in pyloric antrum
Oxyntic mucosa (exocrine)
3 types of cells
what they secrete
gastric exocrine secretory cells
-mucous neck cells- secrete mucous
-cheif cells-secrete pepsinogen
-parietal/oxynic cells- secrete HCl
Gastric endocrine cells
one ex and what it secretes
ECL cell
-secretes hormones
what stimulates mucous cells
mechanical stimulation
what stimulates chief cells
Ach, gastrin
what stimulates parietal/oxyntic cells
Ach, gastrin
Parietal/ oxyntic cells :
secretes (2 things)
they require
HCl and intrinsic factor for b12 absorbtion
ATP
chief cells:
secrete..
are in what form?
are activated by..
digest..
pepsinogen
inactive form
HCl
proteins
Mucous neck cells:
secrete
have a rapid..
can become
hint- stem cell
mucous
-lube and neutralize
rapid cell turnover
become epithelial cells or parietal or chief cells
Enterochromaffin-Like (ECL) Cells:
secrete..
what kind of signal- far or close
stimulated by
stimulate..
secrete histamine
paracrine- acts locally
stimulated by gastrin, or ACH
they stimulate parietal cells to secrete hcl
Pyloric Gland Area
No HCl secretion, very little
pepsinogen
pyloric gland area contains what exocrine cells (2)
mucous and cheif
G cell
secretes..
secreted into the ..
stimulates by..
G means….
Gastrin
stimulated by chyme/protein in stomach
into the blood stream!
G means GO
all things are activated- motility
D cell
secretes..
not secretes into the blood. its acts..
D means ..
secretes somatostatin
acts locally
DONT
inhibits all motility
exocrine vs endocrine
and organize cells
mucous, cheif, parietal, ECL, G and D cells
Exocrine Glands
Secretion: Release their products (like enzymes, sweat, and mucus
-mucous, cheif and parietal cells
Endocrine Glands
Secretion: Release their hormones directly into the bloodstream
-ECL, G and D
control of secretion 3 phases
cephalic- coming from head (external stimuli)
-see, smell, taste, chewing, swallow
gastric- coming from stomach
-distention, caffine, protein, acidic
intestinal- coming from duodenum
-distention, fatty, acidic
mucosa protection
-protects from
degradation and ulcers
-H cannot diffuse
