Which sequence correctly describes a simple reflex arc?
Correct answer: B. Receptor, sensory neuron, interneuron, motor neuron, effector
- A. Receptor, motor neuron, interneuron, sensory neuron, effector
- B. Receptor, sensory neuron, interneuron, motor neuron, effector
- C. Effector, sensory neuron, receptor, motor neuron, interneuron
- D. Sensory neuron, receptor, motor neuron, interneuron, effector
Explanation
A stimulus is detected by a receptor, carried by a sensory neuron to the spinal cord, processed through an interneuron, and sent by a motor neuron to an effector. This arrangement allows a rapid protective response.
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About Nervous System and Special Senses
The nervous system covers neurons, neuroglia, nerve impulses, synapses, reflex arcs, and the organization of the central and peripheral nervous systems. It also explains the autonomic divisions and the receptors and pathways for vision, hearing, balance, taste and smell, distinguishing sensory reception from conscious perception.
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