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Adrenaline

A catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action.adrenaline

(Science: hormone) a hormone produced by the adrenal medulla in mammals. It can be produced synthetically for medical purposes. It is secreted by the adrenal medulla in response to low blood glucose, exercise and stress and causes a breakdown of glycogen to glucose in the liver, encourages the release of fatty acids from adipose tissue, causes vasodilation of the small arteries within muscle and increases cardiac output. This is a hormone secreted by an animal in 'fight or flight circumstances, which basically means when the organism has to exert higher than average thinking and movement in a particular situation, usually in danger. Adrenaline increases heart rate, and in general makes the organism more alert to their external environment.


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Re:

... Unlike what I first thought, glycolysis can't take place once glycogenolysis has started because the pyruvate kinase is inhibited by glucagon and adrenaline, so PEP can't turn into pyruvate anymore. Which is only adding to my confusion...

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by Aymeric
Sat Dec 14, 2013 11:51 pm
 
Forum: Human Biology
Topic: When does gluconeogenesis kick in during physical activity?
Replies: 12
Views: 5591

Re:

... brain, red cells and other glucose dependent tissues)? So as soon as glucose shows signs of decreasing, insuline drops and is replaced by glucagon+adrenaline released into the blood, which (according to all the textbooks I've come across) are triggers for both GNG and glycogenolysis. I mean, who's ...

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by Aymeric
Sat Dec 14, 2013 11:11 pm
 
Forum: Human Biology
Topic: When does gluconeogenesis kick in during physical activity?
Replies: 12
Views: 5591

When does gluconeogenesis kick in during physical activity?

... me is that glycogenolysis is the main purveyor of energy during physical exercise, and it is triggered by LOW INSULIN, HIGH GLUCAGON and HIGH ADRENALINE, which is exactly what happens when you start working out. So far so good. But then they tell me that gluconeogenesis is triggered by LOW ...

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by Aymeric
Fri Dec 13, 2013 10:35 am
 
Forum: Human Biology
Topic: When does gluconeogenesis kick in during physical activity?
Replies: 12
Views: 5591

Re: Extended sleeping

when you're stressed and you're adrenaline is up then you "feel" like you don't need to sleep. After the stress leaves and your adrenaline returns to normal levels it can "feel" like you never have enough. Sometimes it ...

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by bioduchamp
Fri Nov 22, 2013 3:09 pm
 
Forum: Human Biology
Topic: Extended sleeping
Replies: 3
Views: 1454

adrenaline

Does adrenaline bound to synapse, when it is relased from suprarenal gland? Or its recepors are on just on the surface cells as well?

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by kapital
Fri Jun 28, 2013 8:23 pm
 
Forum: Physiology
Topic: adrenaline
Replies: 0
Views: 1076
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