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5 votes
A.

When heat is applied too long, blood vessels:
Constrict
b. Dilate
Become less elastic
d. Collapse

User Johnnycrab
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2 Answers

3 votes
I think the answer B. Dilate, they dilate so more blood flow will go to the area and skin, allowing heat to be lost in the environment.
User Peter Verbeet
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3 votes
A. Constrict Hope this helps
User Tirza
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