The myelin sheath encases _____, insulating them.Multiple choice question.dendritesaxonsterminal buttonscell bodies of neurons

Break Down the Problem

1. Identify the function of the myelin sheath.
2. Determine which option it encases.

Relevant Concepts

• The myelin sheath is a fatty layer that surrounds the axons of some neurons, acting as an insulator to facilitate faster transmission of electrical signals.

Analysis and Detail

1. Dendrites: These are extensions of a neuron that receive signals from other neurons and are not typically insulated by the myelin sheath.
2. Axons: The primary function of the myelin sheath is to wrap around axons, which are the long, threadlike parts of a neuron that transmit signals.
3. Terminal buttons: These are the ends of axons and do not get encased by the myelin sheath.
4. Cell bodies of neurons: These contain the nucleus and organelles of the neuron, and they are not encased by myelin.

Verify and Summarize

The myelin sheath specifically insulates axons, allowing for more efficient signal propagation along nerve cells.

Final Answer

The myelin sheath encases axons.