The adaptive significance of the crossed extensor reflex when a person steps on a tack is to
A) remove the foot from the tack.
B) increase the rate at which withdrawal of the limb occurs.
C) slow the rate of removal of the foot from the tack.
D) reduce the pain sensations.
E) prevent the person from falling down.

Question

Quizplus · Accepted Answer

The crossed extensor reflex helps maintain balance by extending the opposite limb to support the body when the other limb withdraws from a painful stimulus like stepping on a tack.

The Adaptive Significance of the Crossed Extensor Reflex When a Person