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A member asked:
When does ur arteries constrict? and if u do 10 pushups that is super hard for u, the blood pressure will go very high in an instant rigtht?
A doctor has provided 1 answer
Constrict/Instant?No: The microscopic end arteries, arterioles, constantly adjust size, over wide range, under both brain control & local feedback, every sec, 24/7. This controls local blood flow, distribution of heart output & (combined with heart output) BP, moment-to-moment 24/7. Any usual BP reading is from only a single heart beat for top, another for bottom number. Usually visible arteries vary in size minimally.
Answered 7/10/2014
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