Which of the following is involved in the first step of the reflex arc?
A. Sensory neuron
B. Receptor
C. Motor neuron
D. Effector
Answer (2)
The first step of the reflex arc involves the receptor, which detects a stimulus and initiates the reflex action. The sensory neuron then carries the signal to the spinal cord. Overall, the receptor plays a crucial role in starting the reflex process. ;
The first step of the reflex arc is initiated by the receptor, which detects a stimulus. This activation messages sensory neurons to transmit the signal to the spinal cord. Therefore, the chosen option is B. Receptor.
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