The part of a reflex arc that detects the stimulus is the:
A)receptor
B)CNS
C)effector
D)motor neuron

Question

Quizplus · Accepted Answer

The receptor is the sensory organ that detects the stimulus and sends information to the central nervous system (CNS) to initiate a reflex action. The CNS processes the information and sends a response to the effector (muscle or gland) via the motor neuron. Therefore, the receptor plays a crucial role in the reflex arc by detecting the stimulus.

The Part of a Reflex Arc That Detects the Stimulus