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496903
Muscles, Nerves and Hormones
Description
A Levels Biology (Responding to the Environment) Mind Map on Muscles, Nerves and Hormones, created by kirareynolds on 21/01/2014.
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biology
responding to the environment
biology
responding to the environment
a levels
Mind Map by
kirareynolds
, updated more than 1 year ago
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Created by
kirareynolds
over 10 years ago
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Resource summary
Muscles, Nerves and Hormones
The 'Fight or Flight' Response
Physiological Changes
Pupils Dilate
Heart rate and BP increase
Blood glucose levels increase
Metabolic rate increases
Endorphins are released
Sweat production increases
Co-ordination of the Physiological Changes
The cerebral understanding of a threat activates the hypothalamus
Stimulates increased activity in the sympathetic nervous system and triggers the release of adrenaline from the adrenal medulla into the blood.
The hypothalamus releases CRF into the pituitary gland stimulating the release of ACTH.
This then stimulates the release of cortisols from the adrenal cortex
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