The autonomic nervous system is a subdivision of the _____ nervous system.

• Central

• Peripheral

• Sympathetic

• Parasympathetic

Axons:

• A usually branched

• Carry nerve impulses to the cell body

• Carry nerve impulses away from the cell body

• Have receptors for neurotransmitters

Sensory neurons are also called

• efferent neurons

• afferent neurons

• interneurons

• glia cells

Which type of glia cell produces myelin for cells in the brain?

• microglia

• Oligodendrocytes

• astrocytes

• neurolemma

The most basic reflex arc is

• a one neuron pathway

• a two neuron pathway

• a three neuron pathway

• an interneuron

Saltatory conduction

• is called “saltatory” because it is caused by sodium chloride.

• is much slower than nonsaltatory conduction.

• occurs only in the dendrites.

• occurs only in the axons.

During a nerve impulse

• the interior of the neuron becomes more negative.

• sodium ions are pumped out of the neuron.

• sodium ions are allowed into the neuron.

• the entire neuron becomes positively charged.

Which of the following structures is not part of a synapse?

• Synaptic knob

• Synaptic cleft

• Neurotransmitter

• Plasma membrane of the postsynaptic cell

The outer membrane of a Schwann cell is called the

• neurilemma

• myelin

• node of Ranvier.

• glia

A reflex arc may not have which of the following?

• A motor neuron

• An interneuron

• A sensory neuron

• A will to live