Question

question: which of these insulates the axon of a nerve cell, allowing messages to be sent quickly? answer options: select one of four myelin sheath dendrites cell body neurotransmitter

Explanation:

To solve this, we analyze each option:

• Myelin sheath: Insulates axons, speeding up nerve impulses.
• Dendrites: Receive signals, not insulate axons.
• Cell body: Contains nucleus, not for insulation.
• Neurotransmitter: Transmits signals between neurons, not an insulator.

So the correct option is Myelin sheath.

Answer:

Myelin sheath