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Asked by JONESH | Oct 17, 2008 | GCSE Level > Biology > Homework
JONESH
JONESH asks:

ANdy is about to runa 1500m meter race. What effecrt has he hormone adrenalin already had on his body ?

etutor answers:

The context of the race is irrelevant here as adrenaline always has the same effects whenever it is released. His heart rate will have increased, and blood will be directed towards his brain and muscles. More detailed effects can be found by goggling 'adrenaline' (the Wikipaedia entry is accurate on it).

2 student responses

ranny17
ranny17
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responded Jan 18, 2009 2:40:08 PM GMT
ranny17
ranny17

When in the bloodstream, it rapidly prepares the body for action in emergency situations. The hormone boosts the supply of oxygen and glucose to the brain and muscles, while suppressing other non-emergency bodily processes (digestion in particular).

It increases heart rate and stroke volume, dilates the pupils, and constricts arterioles in the skin and gastrointestinal tract while dilating arterioles in skeletal muscles. It elevates the blood sugar level by increasing catabolism of glycogen to glucose in the liver, and at the same time begins the breakdown of lipids in fat cells.

responded Jan 18, 2009 2:42:29 PM GMT
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Hattie
Hattie
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