Question

In reflex action, the reflex arc is formed by

[Review question: Pg. No: 226]

• A. Receptor, muscle, spinal cord
• B. Brain, spinal cord, muscle
• C. Muscle, receptor, brain
• D. Receptor, spinal cord, muscle

Answer 1

The correct option is D Receptor, spinal cord, muscle

The afferent neuron receives a signal from the sensory organ; it transmits the impulse via a dorsal nerve root into the spinal cord. The efferent neuron then carries the signal from the CNS to the effector. The stimulus thus forms a reflex arc.