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Cholecystokinin (CCK)
- Duodenum (mucosa)
- stimulates release of digestive enzymes from pancreas, bile from gallbladder, inhibits stomach activity via feedback loop, relaxes sphincter of Oddi
-
Secretin
- Duodenum (mucosa)
- stimulates release of bicarbonate juice from pancreas and bile from liver
- inhibits stomach secretions
-
Glucagon
- Pancreas (alpha cells of islets of langerhans)
- stimulates liver to convert glycogen to glucose and to form glucse from fatty acids/amino acids (gluconeogenesis)
-
Insulin
- Pancreas (beta cells of islets of langerhans)
- stimulates carbohydrate oxidation, glycogen formation and storage
- inhibits glucose formation
-
Hypertensin (angio I)
- Kidney
- formed by combining kidney protein (renin) and blood protein (angiotensinogen)
- stimulates vasoconstriction of blood vessels to raise BP
-
Erythropoietin
- Kidney
- Formed by combining kidney enzyme (renal erythropoietic factor, REF) and blood protein
- stimulates red blood cell formation
-
Estrogens
- Ovaries (small amt. from adrenal cortex)
- Stimulates maturation of reproductive organs and appearance of secondary sex characteristics
-
Progesterone
- Ovaries (small amt. from adrenal cortex)
- with estrogens, regulates menstrual cycle, maintains pregnancy and promotes breast development
-
Relaxin
- Ovaries (and placenta)
- At end of pregnancy, relaxes pubic symphysis and dilates uterine cervix
-
Testosterone
- Testes (small amt. from adrenal cortex)
- stimulates maturation of reproductive organs, appearance of secondary sex characteritics, promotes sperm production
-
Inhibin
- Testes and ovaries
- inhibits secretion of FSH thereby inhibiting spermatogenesis and oogenesis
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