Tutorial 11: brainstem Flashcards
1
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When is the sympathetic nervous system activated?
What are the consequences of it?
A
when you see danger
pupil dilate to increase light reaching retinas & eyelids retract to help eye move efficiently
blood vessel & gut constriction to reroute blood to support muscle activity
HR increase & bronchi dilate to increase oxygenation
adrenal medulla is stimulated to release epinephrine & norepinephrine & glucagon released from pancrea to increase energy availability
piloerector muscle in the skin contract to make hair stand on -> increase size apparent
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