The defecation and urination reflexes are integrated in the
A) brain stem.
B) cerebral cortex.
C) hypothalamus.
D) spinal cord.

Question

Quizplus · Accepted Answer

The defecation and urination reflexes are controlled by the spinal cord. The reflex pathway is initiated when stretch receptors in the bladder or rectum send signals via sensory neurons to the spinal cord. The spinal cord then sends motor signals back to the bladder or rectum to trigger the reflexive contraction of muscles involved in emptying these organs. Therefore, the best choice is D, the spinal cord.

The Defecation and Urination Reflexes Are Integrated in the