Celeste was able to jerk her hand out of the scalding water before sensing any pain because this withdrawal reflex
A) was activated by interneurons in her spinal cord.
B) did not involve any activity within her central nervous system.
C) was activated by the rapidly responding endorphins.
D) was activated by her self-regulating autonomic nervous system.

Question

Quizplus · Accepted Answer

The withdrawal reflex is a reflex arc that is activated by interneurons within the spinal cord, allowing for a rapid and automatic withdrawal of a body part from a potentially harmful stimulus. This reflex occurs without conscious thought or processing in the brain, as it is a protective mechanism that helps prevent further injury. Therefore, option A is the best answer choice. Option B is incorrect as the withdrawal reflex does involve activity within the central nervous system (specifically the spinal cord). Option C is incorrect as endorphins are not involved in the withdrawal reflex. Option D is incorrect as the self-regulating autonomic nervous system is not directly involved in the withdrawal reflex.

Celeste Was Able to Jerk Her Hand Out of the Scalding