Question 9
Distinguishes between afferent sensory neurone and efferent motor neurone.
Answer
| Afferent Sensory Neurons | Efferent Motor Neurons |
|---|---|
| Transmit sensory information from sensory receptors to the central nervous system (CNS). | Transmit motor commands from the CNS to muscles or glands. |
| Unipolar in structure, with a single axon that splits into two branches. | Multipolar in structure, with many dendrites and a single long axon. |
| Cell bodies are located in the dorsal root ganglia (in the PNS). | Cell bodies are located in the CNS (brain and spinal cord). |
| Carry impulses from sensory receptors such as pain receptors, touch receptors, and temperature receptors. | Carry impulses to muscles, triggering muscle contractions, or to glands, stimulating secretion of hormones. |
| Examples include the optic nerve, olfactory nerve, and vestibulocochlear nerve. | Examples include the facial nerve, hypoglossal nerve, and spinal accessory nerve. |
