Nervous System Test Review

Which of the following are cells that support and protect neurons?

• Myelinocytes

• Neuroglia

• Gray matter

• Synapse

Most axons are covered with

• Sodium

• Potassium

• Myelin

• Dendrites

The space between neurons is called

• Synapse

• Neuroglia gap

• Dendritic space

• Neurotransmitter

Chemicals that carry messages between neurons are called

• Synapses

• Neuroglia

• Sodium & potassium

• Neurotransmitters

An unmyelinated axon, dendrite, and cell body are also known as

• White matter

• Gray matter

• Glia

• Astrocytes

What happens to neurotransmitters after they have been used?

• They get broken down and washed away

• They get carried back and recycled

• They become white matter

• They become gray matter

When a neuron is at rest, what ion is outside the cell membrane?

• Na+

• K+

• Cl-

• No ions are outside the membrane

When the charge is reversed in a neuron during an action potential it is called

• Polarization

• Depolarization

• Repolarization

• All of the above

Tags

NGSS.HS-PS2-5

Which material allows messages to travel down the neurons much faster?

• Myelin

• Astrocytes

• Glia

• Gray matter

Which of the following is not part of the central nervous system?

• Brain

• Spinal cord

• Brain stem

• Peripheral sensory nerves