What is the correct sequence of a reflex arc?

The correct option is Stimulus, receptor, sensory neurone, relay neurone, motor neurone, effector. This answer is correct because it matches the approved learning objective to describe a reflex arc using the sequence stimulus, receptor, sensory neurone, relay neurone, motor neurone and effector in the subtopic Structure and function.

The correct option is Stimulus, receptor, sensory neurone, relay neurone, motor neurone, effector. Stimulus, receptor, sensory neurone, relay neurone, motor neurone, effector is correct because it directly supports the approved learning objective to describe a reflex arc using the sequence stimulus, receptor, sensory neurone, relay neurone, motor neurone and effector. This belongs to the subtopic Structure and function within The human nervous system, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Structure and function.