Hormonal control

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4 Terms

1
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what is anticipatory rise

  • prior to exercise HR increases due to release of adrenaline

  • increases O2 supply to muscles


2
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what does adrenaline do

it increases the speed an quality of the impulses sent via the nervous system that regulate cardiac contraction. Allows more O2 to be supplied to working muscles

3
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what impact does adrenaline have on an athlete

  •  Increasing HR and rate of respiration 

  • Constricting blood vessels, which increases BP, helping blood to reach the active muscles

  • Increasing blood glucose levels by stimulating the breakdown of  glycogen  in the liver. This helps increase muscular contracti


4
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what is adrenaline

its a stress hormone that is released by the sympathetic nervous system