All of the following are effector responses that increase body temperature, except a : vasodilation of dermal blood vessels b : hormone release from the adrenal medulla c : release of thyroid hormones d : involuntary contraction of skeletal muscle

Option A

Explanation:

The effector response that increases the body is not associated with vasodilation of dermal blood vessels.

The skins's immense blood supply helps in temperature regulation of the body. The dilated blood vessels helps in heat loss and lowers the body temperature.

Unlike, them the vasoconstriction retains heat and increases the body temperature.

So, the correct answer is option A

it is either c or d and i know for sure it is not a or b