3A Quiz

Which is the correct sequence in the transmission of a neural impulse?

• axon, dendrite, cell body, synapse

• synapse, axon, dendrite, cell body

• dendrite, axon, cell body, synapse

• dendrite, cell body, axon, synapse

Multiple sclerosis is an autoimmune disease in which the body's own immune system destroys the ___ of nerve axons.

• Myelin

• Axon terminal

• Dendrites

• Nodes of Ranvier

An axon conducts nerve impulses ____ the cell body.

• away from

• towards

• both towards and away

• around, bypassing

The brain's supporting cells are called

• glial cells.

• neurons.

• mitochondria.

• somas.

Neurons that travel toward the central nervous system are called

• exit neurons

• Schwann cells

• afferent neurons

• efferent neurons

Impulses that travel down a myelinated neuron move faster than if it were unmyelinated.

• true

• false

What is letter W showing?

• Neurotransmitter

• Axon

• Axon button

• Dendrite

______ neurons carry messages to the central nervous system.

• Motor

• Inter

• Glial

• Sensory

________ send signals way from the neurons whereas ___ receive signals from other neurons.

• Dendrites; axons

• Axons; dendrites

• Synapses; dendrites

• Axons; synapses

Identify Letter X.

• Neurotransmitter

• Action potential

• Chemical messenger

• Synapse