Question

question 15 1 pts duc is at the doctor for his annual physical checkup. when the doctor strikes his knee, which part of duc’s nervous system responds with a reflex?
○ his motor cortex
○ white matter in his spinal cord
○ gray matter in his spinal cord
○ his somatosensory cortex

Explanation:

Reflexes like the knee - jerk reflex are controlled by the spinal cord's gray matter. The gray matter contains interneurons and the neural circuits for reflexes, while the motor cortex and somatosensory cortex are involved in more complex, voluntary or conscious sensory - motor processing. White matter in the spinal cord is mainly for transmitting signals, not for reflex processing.

Answer:

C. gray matter in his spinal cord