Dictionary » H » Hormone

Hormone

Hormone

(Science: endocrinology) a naturally occuring substance secreted by specialised cells that affects the metabolism or behaviour of other cells possessing functional receptors for the hormone. Hormones may be hydrophilic, like insulin, in which case the receptors are on the cell surface or lipophilic, like the steroids, where the receptor can be intracellular.

Some cancers may be stimulated and others inhibited by hormones (for example breast and prostate cancer). Some hormones can be synthesised and used as replacement in glandular deficiencies or as treatment for some cancers. Hormones may be injected, others taken by mouth. The secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect.Chemical messengers that are produced by organisms which are initiated at target sites (receptors). Hormones are produced by the endocrine system.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Re: mammary gland of male in mammals

... glands are not simply sweat glands that expand and develop more alveoli buds as the breast produces lactose when stimulated with prolactin--the hormone produced primarily during pregnancy and one that is necessary for milk production. Also because of testosterone, the male breast does not have ...

See entire post
by Annij
Sun Nov 03, 2013 4:47 am
 
Forum: Evolution
Topic: mammary gland of male in mammals
Replies: 18
Views: 17795

Re: Fats in the Late Night?

... to support the notion that eating in the late hours of the day accentuates the storage of fatty tissue . After eating, the pancreas releases a hormone called insulin . Insulin then signals muscle and fat cells to absorb glucose from food. Sleep deprivation can affect the metabolic functions ...

See entire post
by Coelacanth
Sun Oct 13, 2013 5:50 am
 
Forum: Physiology
Topic: Fats in the Late Night?
Replies: 1
Views: 1755

cAMP 2nd Messenger Pathway and Experiments

... from cyc- cells were isolated and mixed with protein extracts from cells which exhibited adenylyl cyclase activity (cyc+ cells). Stimulating hormone, ATP, GTP, and Mg2+ were included in the mixture. The mixture was: cell membranes from cyc-, protein extracts from cyc+, and hormone, ATP, GTP, ...

See entire post
by mkay28
Tue Sep 24, 2013 10:43 pm
 
Forum: Cell Biology
Topic: cAMP 2nd Messenger Pathway and Experiments
Replies: 2
Views: 2129

O level Past paper exam question on gland secretion

... by endocrine glands are usually in the form of small molecules. In fact, I don't even know what does it mean by small molecules. Insulin is a hormone, but it is also a protein. If it's a protein, then is it a small molecule? I can't interpret this question very well, can somebody help me please?

See entire post
by WilliamY
Sun Jun 16, 2013 9:10 am
 
Forum: General Discussion
Topic: O level Past paper exam question on gland secretion
Replies: 1
Views: 1835

Re: How Genes/expression Determine Organism Shape

... results in birth defects. As to the other aspect of your question - genetic regulation of organism's size: Imagine this: Gene1 = produces growth hormone Gene 1 allele A (which is a variant of this gene) - can make 100 units of hormone per hour. Gene 1 allele B - can make only 50 units of hormone ...

See entire post
by Cat
Mon May 20, 2013 1:41 pm
 
Forum: Genetics
Topic: How Genes/expression Determine Organism Shape
Replies: 2
Views: 5187
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 47,093 times. 
What links here | Related changes | Permanent link