Neurosecretory Cells

last updated by

zenith_beth 18 years, 11 months ago

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- November 29, 2005 at 7:36 pm #2699
  zenith_beth
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  “Information”, in the form of hormones, passes from the hypothalamus to the pituitary gland via neurosecretory cells. How are these neurosecretory cells adapted for their role in secretion? ❓
- November 29, 2005 at 8:01 pm #33819
  MrMistery
  Participant
  Do you mean the cells that produce ADH and oxitocin? Well, they have big cellular bodies with a vey well developed endoplasmic reticulum and Golji apparatus.
- November 30, 2005 at 7:28 pm #33932
  zenith_beth
  Participant
  Yes, those are the ones I was referring to. The ER and Golgi are important in the production of the hormones… but is there anything else which has to do with secretion?
- November 30, 2005 at 8:05 pm #33939
  MrMistery
  Participant
  Do you know what secretion actually means on a cellular level? It basically means releaseasing of secretion vesicle formed in the TGN. Check the role of the golgi apparatus and you will see that one of the main function is creation of secretion vesicles.
  So yes, Well developed RER and Gogli apparatus and a large number of mitocondria are adaptations to secretion. You can not divide secretion from production in this case.
  Another adaptation is the production of it’s own proteins, called neurophisines, that are nothing more than a special class of MAP(microtubule associated proteins). They transport the hormones at a speed of 3 mm/day from the cellular body along the axon to the terminal side.
  Good enough for you?
- December 5, 2005 at 5:18 pm #34355
  zenith_beth
  Participant
  Thanks for explaining it!! 🙂
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