defecation reflux Flashcards
The colon absorbs water, electrolytes, and some vitamins in a process called
absorption
What is feces made up of?
Water
Inorganic salts
sloughed-off epithelial cells
-products of bacterial decomposition
Undigested food portions
Defecation reflux step 1
Rectal wall distends and stretch receptors send sensory nerve impuses to the sacral spinal cord
Defecation refux step 2
Motor impulses travel back to the desceding colon, sigmoid colon, rectum and anus
Defecation reflux step 3
Longtiudinal rectal muscles contract and internal anal sphincter opens
This hormone promotes secretion of gastric juice, increases gastric motility, and promotes growth of gastric musoca
Gastrin
This hormone participates in distension of stomach, partially digested protein, caffeine in stomch, high pH
Gastrin
This hormone is has high level of H+ and acidic chyme that enters small intestine
secretin
- feeling full, stimulates secretiob of pancreatic juice rich in digestive enzymes, has partially digested proteins (amino acids), trigylcerides, and fatty acids that enter small intestine
CCK