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Secretion

Definition

noun, plural: secretions

(1) The physiological process of synthesizing and eventually releasing substances from the interior of a cell to its exterior

(2) The substance secreted


Supplement

In eukaryotes, cells primarily involved in secretion have well-developed endoplasmic reticulum and Golgi apparatus. Secretion may also occur without involving the classical ER-Golgi pathway. Examples are blebbing, lysosomal secretions, etc.

In humans, the glands comprised mainly of secretory cells are responsible for the production and release of substances essential to different bodily functions. The glands can be classified into two kinds:

In prokaryotes, such as bacteria, secretion occurs by releasing substances from the bacterial cell interior to its external environment.


Word origin: Latin secretio, from secernere (to secrete)

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Results from our forum


Fasting and bloodsugar

After a meal, there is increase in the blood sugar level (glucose), which is regulated by Insulin secretion. But during fasting, when there is no food directly provided to the body to get it converted to glucose , blood sugar level rises slowly than normal.

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by vinu
Sat Mar 01, 2014 10:44 am
 
Forum: Human Biology
Topic: Fasting and bloodsugar
Replies: 3
Views: 365

What do you do when talking to creationists?

... you remove many of the parts from a flagellum, you have a structure quite similar to the toxin injector used in bubonic plague bacteria (Type III Secretion System). Another thing I use is the idea based on the mousetrap argument- that a mousetrap without some parts can be used to shoot spitballs, ...

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by FriarBroccoli
Sat Jan 18, 2014 2:40 am
 
Forum: Evolution
Topic: What do you do when talking to creationists?
Replies: 4
Views: 1485

What do you do when talking to creationists?

... you remove many of the parts from a flagellum, you have a structure quite similar to the toxin injector used in bubonic plague bacteria (Type III Secretion System). Another thing I use is the idea based on the mousetrap argument- that a mousetrap without some parts can be used to shoot spitballs, ...

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by Dubnium105
Fri Jan 17, 2014 11:08 pm
 
Forum: Evolution
Topic: What do you do when talking to creationists?
Replies: 4
Views: 1485

Re: O level Past paper exam question on gland secretion

Hi WilliamY, I am no expert on the Endocrine system, this seems like a oddly worded question. The first thing I would think of though is relative molecule size, for example Insulin is gigantic when compared to the size of considerably small molecules such as water. Is Insulin a relatively small prot...

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by Amphibitile
Sun Jun 23, 2013 12:37 am
 
Forum: General Discussion
Topic: O level Past paper exam question on gland secretion
Replies: 1
Views: 1191

O level Past paper exam question on gland secretion

I was preparing for exam and I came across this question, sorry it may not be suitable to ask in this forum but I need a little help. UCLES 03 O level Bio. 5093/2 Dec. Q.5 Suggest an explanation for the fact that the chemicals produced by endocrine glands are usually in the form of small molecules. ...

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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: 1191
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