BIO: Nervous System

Front

What is the insulating material that forms a layer around the axon of a neuron?

Back

Myelin sheath

Front

What is the long, fiber-like part of a neuron that sends information to receiving neurons?

Back

Axon

Front

What is the insulating membrane that surrounds parts of the axon that helps to protect and propagate action potential?

Back

Myelin sheath

Front

What are the two main components of the central nervous system (CNS)?

Back

Brain and spinal cord

Front

What is the function of the myelin sheath?

Back

To insulate the axon and increase the speed of electrical signals.

Front

What are dendrites?

Back

Branch-like structures of a neuron that receive signals from other neurons.

Front

What is the role of neurotransmitters?

Back

Chemical messengers that transmit signals across a synapse from one neuron to another.

Front

What is an action potential?

Back

A rapid rise and fall in voltage or membrane potential across a cellular membrane.

Front

What is the function of the axon terminal?

Back

To release neurotransmitters into the synapse.

Front

What is the Node of Ranvier?

Back

Gaps in the myelin sheath that facilitate the rapid conduction of nerve impulses.