On coming inside from the cold,students notice that their cheeks are red.This results from
A)dilation of the blood vessels in the dermis of the cheeks.
B)constriction of the blood vessels in the epidermis of the cheeks.
C)increased permeability of superficial vessels.
D)constriction of the sweat glands in the cheeks.
E)damage to the epidermis by the cold.

Question

Quizplus · Accepted Answer

The dilation of blood vessels in the dermis of the cheeks allows for increased blood flow and oxygen delivery to the area, causing the skin to appear red. Constriction of blood vessels in the epidermis or damage to the epidermis itself would not result in the characteristic redness seen in cold-exposed skin. Increased permeability of superficial vessels and constriction of sweat glands do not directly contribute to the redness of the cheeks.

On Coming Inside from the Cold,students Notice That Their Cheeks