GI Hormones

Cards (37)

  • list the four major GI-regulating hormones
    gastrin, CCK, GIP, secretin
  • which is stimulated by amino acids in the stomach?
    gastrin
  • which is stimulated by acid in the small intestine?
    secretin
  • which is stimulated by glucose in the small intestine?

    GIP
  • which is inhibited by excess acid in the stomach?
    gastrin
  • which two inhibit the motility of gastric emptying?
    CCK & secretin
  • which stimulates exocrine enzymes from the pancreas?
    CCK; secretin amplifies this
  • which stimulates pancreatic duct bicarbonate secretion?
    secretin; CCK amplifies this
  • which is secreted from the stomach?
    gastrin
  • which are secreted from the small intestine?
    CCK, secretin , GIP
  • which is stimulated by amino acids and fatty acids in the small intestine?
    CCK
  • which stimulates stomach motility and acid secretion?
    gastrin
  • which stimulates gallbladder contraction and sphincter of Oddi relaxation?

    CCK
  • which stimulates mass movement by the large intestine?
    gastrin
  • compared to normal blood pH, describe the pH of blood in veins leaving the stomach
    more basic, ^pH
  • compared to normal blood pH, describe the pH of blood in veins leaving the pancreas
    more acidic, decreased pH
  • classified as a peptide/protein hormone
    insulin and glucagon
  • secreted from B-cells if the islets of Langerhans
    insulin
  • secreted from a-cells of the islets of Langerhans
    glucagon
  • secretion is stimulated by an increase in plasma glucose (hyperglycemia)

    insulin
  • receptors are located on plasma membranes of target cells
    insulin and glucagon
  • secretion is stimulated by acetylcholine released from parasympathetic neurons
    insulin
  • stimulates absorptive state events and inhibits post-absorptive state events
    insulin
  • stimulates post-absorptive state events and inhibits absorptive state events
    glucagon
  • stimulates glucose uptake and glycogenesis in muscle, liver, and adipose tissue
    insulin
  • secretion is not regulated by the pituitary (there is no "endocrine hierarchy")

    insulin and glucagon
  • stimulates lipogenesis in liver and adipose tissue
    insulin
  • is the only anabolic hormone that reduces ECF glucose
    insulin
  • secretion is stimulated by a decrease in plasma glucose (hypoglycemia)
    glucagon
  • mainly targets the liver where it stimulates glycogenolysis, gluconeogenesis, and increased ketone synthesis
    glucagon
  • stimulates amino acid uptake and protein synthesis in muscle
    insulin
  • secretion and function is part of a negative feedback loop that helps to restore plasma glucose concentrations to normal levels

    insulin and glucagon
  • inhibits gluconeogenesis and glycogenolysis in the liver
    insulin
  • secretion is stimulated by norepinephrine released from sympathetic neurons and plasma epinephrine
    glucagon
  • secretion is stimulated by increased plasma concentrations of amino acids and fatty acids
    insulin
  • increases the fusion of intracellular vesicles containing GLUT-4-facilitated diffusion transporters with plasma membranes of muscle and adipocytes, thereby promoting glucose uptake into these cells

    insulin
  • function is similar to several other hormones that stimulate the catabolism of glucose or fat stores
    glucagon