Stimulation of Secretions Flashcards
three hormones that stimulate secretions by glandular cells
acetylcholine
gastrin
histamine
acetylcholine comes from what
cholinergic neurons
gastrin is released by what
G cells
histamine is secreted by what cells
enterochromaffin-like cells (ECL-cells)
where are enterochromaffin-like cells (ECL-cells) found
gastric mucosa
two phases of secretion
cephalic and gastric
when does the cephalic phase of secretion begin
anticipation of eating a meal
when does gastric phase of secretion begin
when food enters the stomach
what nervous system is stimulated in the cephalic phase of secretion
enteric
in the cephalic phase of secretion ______ is released and binds to receptors
acetycholine
when acetylcholine binds to receptors it causes which three cells to secrete
parietal cells
chief cells
G cells
gastrin travels to _____ cells and _____ cells
parietal
ECL (where histamine is released)
acetylcholine also triggers _______ release by _____ cells
histamine
ECL
histamine stimulates _______ cells to produce more H+ and Cl- ions
parietal
in the gastric phase of secretion, glandular cells are stimulated by what
stretching of stomach wall
in the gastric phase of secretion, peptides are formed by what
protein breakdown
in the gastric phase of secretion, trigger what two reflexes to and from the brain
enteric and vagal
in the gastric phase of secretion, what stimulates secretions
released acetylcholine
in the gastric phase of secretion, what is released from stimulated secretions
histamine from ECL-cells, and gastrin from G cells
in the gastric phase of secretion, gastrin stimulates more_______ to release from ECL cells
histamine
in the gastric phase of secretion, HCl acid production does what
increases
in the gastric phase of secretion, the stomach can be as acidic as what
pH 2.0
