When it is cold the blood vessels of the skin - JAMB Biology 1993 Question
When it is cold, the blood vessels of the skin
A
dilates to increase the amount of blood flowing
B
constrict to reduced the amount of blood flowing to the skin
C
dilate to reduce the amount of blood flowing to the skin
D
constrict to increase the amount of blood flowing to the skin
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Correct Option: B
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