The visceral motor system that provides automatic, involuntary regulation of smooth and cardiac muscle and glandular secretions is the .

In times of infection or injury the type of neuroglia that will increase in numbers is .

The "branches" that enable a single neuron to communicate with several other cells are called .

Sensory information is brought to the CNS by means of the .

An action potential occurs only if the membrane is lowered to the .

The process that conducts impulses along an axon at a high rate of speed is called conduction.

Chemical synapses that release the neurotransmitter acetylcholine are known as synapses.

Chemical synapses that release the neurotransmitter norepinephrine are known as synapses.

The spread of nerve impulses from one neuron to several neurons is called .

Automatic motor responses, triggered by specific stimuli, are called .