Exam 13: A: Nervous System Cells

If a person were in a high stress,emergency situation,the sympathetic division of the autonomic nervous system would be active.

Glutamate is the most common excitatory neurotransmitter in the CNS.

A membrane that exhibits a membrane potential is said to be depolarized.

Local potentials usually occur in the dendrite or soma of the neuron.

The Greek word for tree correctly describes the shape of the axon.

Gray fibers have no association with Schwann cells.

Action potential and membrane potential are synonymous terms.

It is now known that fresh new neurons are often added to existing networks of neurons.

There are differences between the central and peripheral nervous systems concerning the repair of damaged fibers.

In an ipsilateral arc,the effectors and receptors are on opposite sides of the body.

Regeneration of nerve fibers is impossible,even if the cell body is intact and the fibers have a neurilemma.

Most nerves in the human nervous system are mixed.

Pathways from the autonomic nervous system that form the thoracic region of the spinal cord would be sympathetic pathways.

The influx of sodium ions causes the release of neurotransmitters from the synaptic knob.

Neurons have,at best,a limited ability to repair themselves.

The relative refractory period can determine the strength of a stimulus even if the axon functions on the "all-or-none" law.

Like other cells of the nervous system,glia cells have lost their capacity for cell division.

The efferent division of the nervous system consists of mostly sensory pathways.

The nervous system and the endocrine system share a common function of communication.

Some astrocytes have cilia that help keep the fluid in the nervous system moving.