Module 9: Neurons and Neural Communication

What is Structure A?

• Dendrites

• Axon Terminal

• Axon

• Soma/Cell Body

When a neuron is at REST, the majority of NEGATIVE IONS are

• outside of the axon.

• inside of the axon.

• no where near the axon.

A/an _____________________ is CHEMICAL MESSAGE released by the terminal branches.

• action potential

• neurotransmitter

• myelin sheath

• synapse

During DEPOLARIZATION,

• positive ions flood the axon.

• negative ions flood the axon.

• the neuron splits in half.

• the neuron dies.

The _____________________ is a brief ELECTRICAL CHARGE that moves down the axon.

• action potential

• neurotransmitter

• myelin sheath

• synapse

When a neuron enters a _____________________ period, it cannot immediately fire another action potential.

• refractory

• depolarization

• polarization

• reuptake

What is Structure F?

• Dendrites

• Axon Terminal

• Axon

• Myelin Sheath

After being released, some of the neurotransmitters are REABSORBED by the presynaptic neuron in a process called ____________________.

• reuptake

• depolarization

• polarization

• resting potential

The MYELIN SHEATH allows the action potential to travel

• FASTER!!!

• SLOWER!!!

• to PARIS!!!

If the myelin sheath begins to deteriorate, someone may get ____________________.

• multiple sclerosis

• Parkinson's

• Alzheimer's

• a gift card