Question

Where are the Nissl bodies typically found?

perikaryon (neuron cell body)


myelin sheath


axon terminals


axon hillock


all of the above

Answer 1

Nissl bodies are typically found in the perikaryon (neuron cell body) of a neuron.

Nissl bodies are clusters of rough endoplasmic reticulum and ribosomes that are responsible for the synthesis of proteins necessary for the normal functioning of the neuron. They are found in the cell body and dendrites of the neuron, but not in the axon or axon terminals.

The myelin sheath is a fatty covering that surrounds axons, formed by specialized cells called glial cells. The axon terminals are the endings of the axon that release neurotransmitters to communicate with other neurons or effector cells. The axon hillock is the site where the axon emerges from the neuron cell body.

Therefore, the correct answer is perikaryon (neuron cell body).