Which of the Following Examples Listed Below Illustrates Homeostasis Maintained

Multiple Choice

Which of the following examples listed below illustrates homeostasis maintained by a negative feedback?

A) Production of vitamin D initiated by the suns UV light striking the skin.
B) Formation of cerumen wax to deter insects from entering the ear.
C) Thickening of epidermis to form a callus in places where the skin is exposed to friction.
D) Changes in the response of the hair follicle to dihydrotestosterone (DHT) .