Neuron Review

Front

What is an action potential?

Back

An action potential is an electrical signal that travels along the neuron, with the inside of the neuron being more negative.

Front

Why is hyperpolarization important?

Back

Hyperpolarization prevents a second, unwanted signal from being sent.

Front

What are astrocytes?

Back

Astrocytes are neuroglial cells that produce scar tissue in the brain and spinal cord and contribute to the blood-brain barrier.

Front

What do motor neurons do?

Back

Motor neurons send nerve impulses to muscles and glands by the command of other neurons.

Front

What is the myelin sheath?

Back

The myelin sheath is a fatty layer that insulates neurons, helping to speed up nerve impulses.

Front

What are oligodendrocytes?

Back

Oligodendrocytes are neuroglial cells that form the myelin sheath in the central nervous system (CNS).

Front

What are Schwann cells?

Back

Schwann cells are neuroglial cells that form the myelin sheath in the peripheral nervous system (PNS).

Front

What is the function of neuroglia?

Back

Neuroglia support and protect neurons, helping to maintain a healthy environment for nerve cells.

Front

What is the resting potential of a neuron?

Back

The resting potential of a neuron is typically around -70 mV.

Front

What is the role of sensory neurons?

Back

Sensory neurons carry signals from sensory receptors to the central nervous system.