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Hormones and Endocrine System Basics
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Hormones and Endocrine System Basics - 03-06-2013, 10:44 AM

Intrecellular Communication:

Signals that are transmitted between animal cells are often classified by two criteria; type of secretion and the route taken by the signaling hormone.

Types of Signaling:

a. Endocrine Signaling: secretion directly into the blood stream that then trigger further response in target cells located all around the body. Example: Insulin

b. Paracrine Signaling: Secretion of local regulators act over a short distance affecting neighboring cells, this and autocrine signaling rely on diffusion. Autocrine Signaling is again the secretion of local regulators but the target cell is the cell releasing the signal. These signaling methods play a role in blood pressure, nervous system functions, and reproduction (just a few).

c. Synaptic and Neuroendocrine Signaling: In synaptic signaling neurotransmitters diffuse across synapses triggering a response. While in Neuroendocrine Signaling, nuerohormones are released into the bloodstream producing a response from target cells. Example: Vasopressin (an anti-diuretic hormone)

d. Pheromone Signaling: These are hormones that don't affect you as directly but your environment; as they are excreted or released. Example: Body Odor

Endocrine Glands/ Tissues/ Organs:

Endocrine system cells are found in organs all over your body, such as your digestive track (stomach contains isolated endocrine cells), while other endocrine cells are grouped in ductless organs, these are called endocrine glands. Endocrine glands secrete hormones directly into the surrounding cells, this should be noted as the complete opposite of salivary glands which have ducts to carry secreted substances.

Major Endocrine Glands:
Hypothalamus
Pineal Gland
Thyroid Gland
Parathyroid Glands (Behind Thyroid)
Adrenal Gland (on kidneys)
Pancreas
Testes

Organs Containing Endocrine Cells:
Thymus
Heart
Liver
Kidneys
Small Intestine

Cellular Response Pathways:

Hormones vary in size and chemical properties.Some of these differences are more apparent than others but I would like to look at the three major classes of hormones polypeptides, steroids, and amines. steroids hormones are lipids containing four fused carbon rings. all are derived from the steroid cholesterol (example would be testosterone or cortisol). Polypeptides are made up of two polypeptide chains and most in this group are formed by cleavage of one long polypeptide chain (example insulin). Amine hormones are synthesized from a single amino acid either tyrosine or tryptophan (examples are ephindrine or thyroxine). Hormones vary in their solubility while polypeptides and amines tend to be water soluble steroids tend to be lipid soluble. Water soluble hormones are hydrophilic and must bind to a cell surface receptor. Lipid soluble hormones are Lipid soluble and tend to diffuse into the cell as my post on testosterone diffusion explained. While I will need to explain signaling transduction (process water soluble hormones take) another time.

This is all the time I have today guys, hope you like it
Ironbuilt likes this.


Everything said by Andrew.peplin is for learning purposes. In no way does Andrew.peplin support the use or possession of any illegal drugs.
   
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03-06-2013, 11:31 AM

Interesting read. Thanks for sharing!





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Hormones and Endocrine System Basics
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Hormones and Endocrine System Basics - 03-06-2013, 01:46 PM

Don't want to hijack your thread, but do you think you could add a couple of lines about prostaglandins and their role in mediation of paracrines. I feel that that prostaglandins aren't talked about enough in the conversations of sports physiology and ergogenics.
   
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03-06-2013, 04:54 PM

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Originally Posted by Enigmatic707 View Post
Don't want to hijack your thread, but do you think you could add a couple of lines about prostaglandins and their role in mediation of paracrines. I feel that that prostaglandins aren't talked about enough in the conversations of sports physiology and ergogenics.
Not a problem man, I will finish up writing the rest this weekend and add that in for you.


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Hormones and Endocrine System Basics
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Hormones and Endocrine System Basics - 03-06-2013, 06:01 PM

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Originally Posted by Andrew.peplin View Post
Not a problem man, I will finish up writing the rest this weekend and add that in for you.
It's funny cause when I talk about the possible cause for certain local effects of steroid use and I mention the possibility that it could an action mediated by prostaglandin activity- everyone just kinda says "prosta- what?"
   
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03-06-2013, 10:14 PM

Good info Andrew . Thanks and will continue to follow so I can keep learning new things everyday here.. Is this profession knowledge or copied from profession . . Or from web. ?.. Just curious.
   
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03-15-2013, 03:57 PM

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Originally Posted by Ironbuilt View Post
Good info Andrew . Thanks and will continue to follow so I can keep learning new things everyday here.. Is this profession knowledge or copied from profession . . Or from web. ?.. Just curious.
I am a student myself and write these articles for the sake of sharing. Its finals weeks right now so I have been having a hard time getting around to finish this article I will do my best to get the rest typed up soon.


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03-15-2013, 09:11 PM

please make this a complete article. sources, full write up, maybe even pics. because this is what all people should know and understand! this is VITAL info that most people who do or even don't use aas do not understand.

what are you impacting
how is this changing your natural function.
what else, other than muscles are we changing

questions no one (or nearly) bothers to ask.

good on you sir to do this!


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