Loren bio 6.2

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  1. Where is the hypothalamus?
    brain....above the pituitary gland
  2. What controls the hypothalamus?
    neural signals make it turn on
  3. What does the hypothalamus do?
    • stimulates or inhibits the anterior pit.
    • makes oxytocin/ADH for the post. pit.
  4. What two things does the hypothalamus have for the ant. pit.
    • GnRH
    • ACTH-rf (releasing factor)
  5. What does GnRH do?
    stimulates the anterior pit. to give FSH and LH
  6. What controls release of ant. pit.'s FSH and LH?
    GnRH from hypo
  7. What is ACTH-RF?
    acth Releasing factor
  8. What two hormones are made in the hypo then shipped to the post. pit?
    oxytocin and ADH
  9. Where's the thyroid?
    on the trachea
  10. What does the thyroid do?
    produce/secretes thyroxin, calcitonin
  11. What are the two thyroid hormones (not including calcitonin)
    • thyroxine
    • triiodothyronine
  12. What do the thyroid hormones do?
    stimulate growth and neuro development in children
  13. What does hypothyroidism do? vs. Hyper
    • hypo: undersecreted, cold, fatigue, weight gain]
    • hyper: opposite
  14. Where does calitonin come from?
    thyroid glands
  15. What does calcitonin do?
    it decreases [Ca+] by inhibiting release of Ca from bones
  16. What two hormones does the pancreas give off? G I
    • glucagon
    • insulin
  17. Where are the islets of langerhorn, and what do they do?
    • On the pancreas
    • make and secrete Glucagon and Insulin
  18. What does glucagon do?
    • it increases blood glucose
    • stimulates protein and fat degradation (glycogen to glucose)
  19. What is glucagon antagonistic to?
  20. what is insulin antagonistic to?
  21. What does insulin do?
    • lower blood glucose
    • encourages muscle uptake of suger
  22. Where's the parathyroid glands?
    posterior surface of the thyroid
  23. What do the parathyroid glands secrete?
    PTH (parathyroid hormone)
  24. What does the PTH do?
    increases Ca+ concentration in blood (increase bone reabsorption)
  25. What is PTH?
    parathyroid hormone
  26. Where does PTH come from?
    The parathyroid glands
  27. What do kidney glands release?
  28. Where does renin come from ?
  29. What does renin do?
    converts blood protein angiotensin to something else which stimulates adrenal cortex to release aldosterone
  30. what stimulates the adrenal cortex to release aldosterone?
    Renin from the kidneys
  31. When is Renin released?
    when blood volume is down.
  32. What three hormones are released in the GI (gastrointestinal?)?
    • Gastrin
    • Secretin
    • Cholecystokinin
  33. Where does gastrin come from?
    GI glands
  34. wwhere does Secretin come from?
    GI glands
  35. Where does cholecystokinin come from?
    GI glands
  36. What does gastrin do?
    stimulates HCL release after ingested food
  37. What does secretin do?
    stimulates basic release of alkaline bicarbonate (cause of acidic foods)
  38. What does cholecystokinin do?
    Stimulates gall bladder to release bile (for breakup of fatty foods)
  39. Where is the pineal gland?
    base of brain
  40. What does the pineal gland release?
  41. Where does melatonin come from?
    pineal gland
  42. What does melatonin do?
    • regulates circadian rhythms (24 hour physiological stuff)
    • dark light cycles
    • antagonist of MSH
  43. What are the two different mechanisms of Hormone action?
    P S
    Peptide and Steroid
  44. Match Peptide and Steroid with the appropriate mechanism.
    intracellular receptors
    extracellular receptors
    • Peptide: Extracellular
    • Steroid: Intracellular
  45. What are peptide hormones? what do they do?
    they are first messangers that trigger second messengers to do something (surface)
  46. What are steroid hormones? what do they do?
    • Intracellular receptors
    • they enter cell, the hormone and receptor go and get the DNA directly.
Card Set
Loren bio 6.2
Loren bio6.2 endocrinology.2 (hormones)
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