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Question: 1 / 400

During a reflex arc, which neuron directly connects to the muscle?

Sensory neuron

Relay neuron

Motor neuron

The motor neuron is fundamentally important in the reflex arc as it directly connects to the muscle and initiates a response. Once a stimulus is detected by the sensory neuron, it transmits the signal to the spinal cord. Within the spinal cord, this signal is often passed to the relay neuron or interneuron, which processes the information. However, the key role of the motor neuron is to carry the processed signal from the spinal cord out to the muscle, resulting in contraction or movement.

Motor neurons are responsible for transmitting signals to skeletal muscles, allowing for rapid responses to stimuli, which characterizes the functionality of reflexes. This quick route is essential for reflex actions, which are designed to protect the body from harm by enabling an immediate response to potentially damaging stimuli.

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Interneuron

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