Nervous System Intro & Nerve Tissue

Front

What is a nerve impulse?

Back

An electric signal that passes through neurons.

Front

What is a neurotransmitter?

Back

A signal molecule that transmits nerve impulses across synapses.

Front

Which two neuroglial cells form myelin?

Back

Oligodendrocytes and Schwann cells.

Front

What stage are both ions present in large concentrations INSIDE the neuron?

Back

Depolarization.

Front

What does the Somatic Nervous System control?

Back

Controls skeletal muscle contractions.

Front

What is the function of neurons?

Back

To transmit nerve impulses throughout the body.

Front

What is the role of the myelin sheath?

Back

To insulate axons and increase the speed of nerve impulse transmission.

Front

What are the main components of the nervous system?

Back

The brain, spinal cord, and peripheral nerves.

Front

What is the difference between the central nervous system and the peripheral nervous system?

Back

The central nervous system consists of the brain and spinal cord, while the peripheral nervous system includes all other neural elements.

Front

What is an action potential?

Back

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