Module 2 Lesson 1 Review

An electrical signal that travels down the axon of a neuron is called the

• Synapse

• Myelin Sheath

• Action Potential

• Refractory Period

A synapse is a(n)

• chemical messenger that triggers muscle contractions.

• automatic response to sensory input.

• junction between a sending neuron and a receiving neuron.

• electrical cable containing many axons.

Dendrites are branching extensions of

• neurotransmitters.

• endorphins.

• neurons.

• glial cells.

This is a nerve impulse:

• reuptake.

• a refractory period

• an action potential.

• neurogenesis.

Neuron-produced chemicals that carry messages to other neurons or to muscles and glands are called

• synapses.

• interneurons.

• dendrites.

• neurotransmitters.

Neurotransmitters are released from the end (terminal branches) of the

• dendrites.

• cell body.

• myelin sheath.

• axon.

Plasticity refers to the brain's capacity to change by forming new neural pathways based on

• refractory periods.

• lateralization.

• experience.

• reuptake.

Some neurons enable you to grasp objects by relaying outgoing messages to the muscles in your arms and hands. These neurons are called

• interneurons.

• sensory neurons.

• neurotransmitters.

• motor neurons.

The axon of a sending neuron is separated from the dendrite of a receiving neuron by a

• myelin sheath.

• neural network.

• glial cell.

• synaptic gap.

The chemical messengers released into the synaptic gap to carry messages to other neurons or muscles. 

• hormones.

• neurotransmitters.

• interneurons.

• glial cells.