Involuntary contraction of this smooth muscle layer wrinkles and thickens the walls of the scrotum to prevent heat loss.
A) tunica albuginea
B) tunica vaginalis
C) dartos muscle
D) cremaster muscle
E) internal spermatic fascia

Question

Quizplus · Accepted Answer

The dartos muscle is a layer of smooth muscle in the scrotum that contracts involuntarily in response to cold temperatures and other stimuli. This contraction causes the scrotal skin to wrinkle and the tissue to thicken, which helps to reduce heat loss from the testes. The other options listed are not directly involved in this mechanism.

Involuntary Contraction of This Smooth Muscle Layer Wrinkles and Thickens