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The temperature of a person was taken before, during and after taking a cold bath. The results are shown in the graph below.

(a) Explain why the temperature fell during bath.
(b) What changes occurred in the skin that enabled the body temperature to return to normal.

Answer Text:
a)- Heat loss by conduction/convection from the blood vessels in the body skin to the cold water;the cooler blood leaving skin
enters general circulation cooling the whole body.
b)- Vasoconstriction;thus less blood flowing to the skin reducing heat loss.
- No sweating; this eases heat produced through metabolism.