Nerve Tissue

Front

What is represented by the letter H in a neuron diagram?

Back

Terminal branches.

Front

What is the function of the myelin sheath?

Back

It is a spiral insulating material that forms a layer around the axon of a neuron, enabling electrical signals to travel down the axon at higher speeds.

Front

What type of neuron carries messages from the body to the brain/spinal cord?

Back

Afferent/Sensory neuron.

Front

What is the role of dendrites in a neuron?

Back

Dendrites are a network of branches coming from individual neurons that receive information and electrical signals within the nervous system.

Front

What type of neuron carries messages from the brain/spinal cord to the body?

Back

Efferent/Motor neuron.

Front

Define 'axon'.

Back

An axon is a long, slender projection of a neuron that conducts electrical impulses away from the neuron's cell body.

Front

What is the function of Schwann cells?

Back

Schwann cells are responsible for the formation of the myelin sheath around peripheral nerves.

Front

What is a neurotransmitter?

Back

A neurotransmitter is a chemical messenger that transmits signals across a synapse from one neuron to another.

Front

What is the difference between afferent and efferent neurons?

Back

Afferent neurons carry sensory information to the brain, while efferent neurons carry motor commands from the brain to the body.

Front

What is the significance of the node of Ranvier?

Back

Nodes of Ranvier are gaps in the myelin sheath that facilitate the rapid conduction of nerve impulses.