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Adrenal physiology

  1. Adrenal medulla - what type of cells
    chromaffin cells
  2. Adrenal medulla - secrete what
    secrete the catecholamines noradrenaline and adrenaline
  3. Adrenal medulla - innervated by
    splanchnic nerves
  4. How do chromaffin cells to secrete their contents? (& what was secreted from pre-ganglionic SYMpathetic fibres?
    • by exocytosis 
    • (the preganglionic sympathetic fibres secrete acetylcholine causing the chromaffin cells to secrete their contents by exocytosis)
  5. Phaeochromocytomas - derived from and secreted what?
    • - chromaffin cells of sympathetic ganglia
    • - secrete both adrenaline and nor adrenaline.
  6. How many histologically distinct zones - adrenal cortex? (zone - location - hormone)
    Zone / Location / Hormone Secreted

    + Zona glomerulosa - Outer zone - Aldosterone

    + Zona fasiculata- Middle zone - Glucocorticoids

    + Zona reticularis - Inner zone - Androgens
  7. Which hormones are plasma protein bound?
    The glucocorticoids and aldosterone are mostly bound to plasma proteins in the circulation
  8. What are inactivated & excreted by liver?
    Glucocorticoids are inactivated and excreted by the liver.
Author
trincam2008
ID
346185
Card Set
Adrenal physiology
Description
Adrenal physiology - medulla + cortex
Updated

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