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hormone regulation?

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hormone regulation?

Postby jananiprahlad » Sun Aug 07, 2005 3:28 pm

Heyy, could someone please let me know what factors regulate hormone secretion? Are there any other factors apart from the receptors and the secondary messengers?
Thanks!
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Postby iri_black » Mon Aug 08, 2005 6:19 am

Most metabolic processes are regulated by the hypothalamus. The hypothalamus links the nervous system to the endocrine system by synthesizing and secreting neurohormones.
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Postby jananiprahlad » Mon Aug 08, 2005 11:31 am

those are the trophic hormones, right? (acth, etc)
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Postby victor » Mon Aug 08, 2005 11:49 am

Hormone secreted by hypothalamus are called thropic hormone? IMMSMR.
But, still, the metabolism process indirectly make the hormone glands secreted hormones to stimulate certain organs..
Hypothalamus as the master glands stimulate directly to the metabolism and some of the hypothalamus hormone stimulate other hormone glands to secrete their own hormone...beside the metabolism process, psychic factors also take part in that....ever know about PEA (Phenylethylamine)?? it's the 'happy' hormone.. :lol:
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Postby iri_black » Mon Aug 08, 2005 12:14 pm

Neurons in the hypothalamus are linked to the limbic system which is involved in the control of emotions and sexuality. So I think also hypothalamus is responsable for the "happy hormone" :) .
Also controles hunger, thirst and body temperature.

The hypothalamus is cool.... :D
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Re: hormone regulation?

Postby Dr.Stein » Tue Aug 09, 2005 5:56 am

jananiprahlad wrote:Heyy, could someone please let me know what factors regulate hormone secretion? Are there any other factors apart from the receptors and the secondary messengers?
Thanks!

Hormone production (synthesis and secretion) can be regulated by:
1. Nonhormone substance, for instance blood sugar. It will affect the production of insulin, glucagon, and epinephrin
2. Nervous system, for instance light via vision organs. It will stimulate the epiphyse to secrete melatonin.
3. Another hormone, for instance in reproductive system. The high level of estrogen will give a negative feedback mechanism to pituitary to stop producing FSH. The low level of FSH will stimulate the production of LH and then increasing the production of progesteron. When the level of progesteron it will give a negative feedback to pituitary again in similar way.

Receptors and secondary messengers play the important role in action mechanism of hormone in their target cells.
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Postby Dr.Stein » Tue Aug 09, 2005 6:03 am

victor wrote:Hormone secreted by hypothalamus are called thropic hormone? IMMSMR.

Naah! :evil: Tropic hormones are produced by pituitary. Hypothalamus produced releasing factor (-RF, -RH) and inhibiting factor (-IF, -IH) ;)
About spelling, it is "tropic" not "thropic", taken from "tropos" means "feed" :)

victor wrote:Hypothalamus as the master glands stimulate directly to the metabolism and some of the hypothalamus hormone stimulate other hormone glands to secrete their own hormone...beside the metabolism process, psychic factors also take part in that....

Wrong! The master of glands is pituitary, and what you explained is the role of pituitary as well :twisted: :wink:
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