Which part of a neuron primarily receives messages (synaptic input) from other neurons?

• A. Myelin sheath
• B. Node of Ranvier
• C. Axon terminals (synaptic knobs)
• D. Dendrites

Answer: (D)

Verified step by step guidance

1. Understand the basic structure of a neuron, which includes dendrites, a cell body (soma), an axon, myelin sheath, nodes of Ranvier, and axon terminals (synaptic knobs).
2. Recall the function of dendrites: they are branched extensions of the neuron that primarily receive incoming signals or messages (synaptic input) from other neurons.
3. Recognize that the myelin sheath is a fatty layer that insulates the axon to speed up electrical signal transmission, but it does not receive messages.
4. Know that nodes of Ranvier are gaps in the myelin sheath that facilitate rapid conduction of nerve impulses along the axon, not reception of messages.
5. Identify that axon terminals (synaptic knobs) are the parts of the neuron that send messages to other neurons, not receive them.