Describe the lamina propria of the fundic stomach. What does it contain?
loose CT gastric (fundic) glands
What makes up the muscularis mucosae of the fundic mucosa?
inner circular and outer longitudinal layers of smooth muscle ----- outermost circular layer exists in some regions of the stomach
Describe the mucous that is secreted from the epithelium of the fundic stomach.
It is part of the gastric mucosal barrier. It is insoluble and gel-like. It stays on the surface of the epithelium. It has a lot of bicarbonate ion. It doesn't mix with chyme. It prevents the stomach from digesting itself.
Where do the endocrine hormones secreted by the GI tract go, and what do they do?
they go back into the blood, come back, and modulate activity of submucosal myenteric plexes ----- this modulates secretory action and motility functions
What are the openings of the mucosa?
Where does the base of the gastric gland basically bottom out?
What is the difference in the submucosa of rugae and gastric pits?
submucosa associated with the gastric pits/glands is a flat line
Where do the endocrine glands of the gastric pit/tube of the stomach secrete? What do they modulate?
into capillaries modulate the activity of the GI tract
Where do the exocrine glands of the gastric pit/tube of the stomach secrete?
product travels into the tube (duct) and travels along tube to lumen of stomach
What traverses the entire length of the lamina propria (- they are envaginations of epithelium in the stomach)?
Where are the secretory cells of the gastric glands found?
mainly in the base region some in neck region too
True or False: Chief cells are zymogenic cells.
What color do chief cells stain?
What color do parietal cells stain?
What does the parietal cell predominately secrete?
What does the chief cell predominately secrete?
Describe the length of gastic pits in cardiac mucosa
shallower approximately the same length as the glands
Describe the base of the gastric pits in the cardiac mucosa. What are the glands primarily composed of?
What is unique about the muscularis externa of the GI tract?
3 layers of smooth muscle the additional layer allows the stomach to contract differently than the small and large intestine and esophagus ------additional plane ---------- allows stomach to mix
Name the layers of smooth muscle in the gastric muscularis of the stomach. Where do you find Auerbach's plexus
inner oblique ------ clearly evident in cardiac region middle circular ------ clearly evident throughout stomach; defined in pyloris where it forms the pyloric sphincter Auerbach's plexus outer longitudinal layer ------ evident in cardia and corpus