anatomy neuron diagram

Front

What is the function of a Schwann cell in a neuron?

Back

Schwann cells are responsible for the formation of the myelin sheath around peripheral nerves, which insulates the axon and increases the speed of nerve impulse transmission.

Front

What is the myelin sheath and its role in neuronal function?

Back

The myelin sheath is a fatty layer that surrounds the axon of some neurons, facilitating faster transmission of electrical signals along the axon.

Front

What is a node of Ranvier and its significance?

Back

A node of Ranvier is a gap in the myelin sheath where the axon is exposed, allowing for the rapid conduction of nerve impulses through saltatory conduction.

Front

What is the axon terminal and its function?

Back

The axon terminal is the endpoint of a neuron where neurotransmitters are released to communicate with other neurons or target cells.

Front

Which neuron is typically responsible for receiving signals from neurotransmitters?

Back

The postsynaptic neuron, often referred to as neuron 'W' in diagrams, receives signals from the presynaptic neuron through neurotransmitter binding.

Front

What are neurotransmitters and their role in neuronal communication?

Back

Neurotransmitters are chemical messengers released from the axon terminal that transmit signals across the synapse to the next neuron.

Front

Describe the structure of a typical neuron. What are its main parts?

Back

A typical neuron consists of a cell body (soma), dendrites, an axon, axon terminals, and may be covered by a myelin sheath.

Front

What is the role of dendrites in a neuron?

Back

Dendrites are branching extensions of a neuron that receive signals from other neurons and transmit them to the cell body.

Front

Explain the process of saltatory conduction. Why is it important?

Back

Saltatory conduction is the process by which nerve impulses jump from one node of Ranvier to another, allowing for faster signal transmission along myelinated axons.

Front

What is the difference between a presynaptic neuron and a postsynaptic neuron?

Back

The presynaptic neuron is the neuron that sends the signal, while the postsynaptic neuron is the one that receives the signal.