Exam 18: Nervous System Cells

The endoneurium is deep to the epineurium.

Microtubules and microfilaments provide a type of "railway" for the rapid transport of organelles to and from the ends of the neuron.

Which is not true of the myelin sheath?

The afferent pathways of the autonomic nervous system stimulate muscles and do not have a sensory component.

In neurons, microtubules are called neurofibrils.

Neurons have:

Oligodendrocytes form myelin sheaths around nerve fibers in the CNS.

In a three-neuron reflex arc, the afferent neurons synapse with the:

Match each term with its definition or description. -Contains the nucleus and various organelles for the neuron

Nerves that contain mostly afferent fibers are called _____ nerves.

Nerves are usually made up of a single large neuron.

The telodendria are:

Astrocytes attempt to assist the neurons of the CNS in healing and regrowth.

Sue was in a severe car accident. She had injuries to her arm and lower spinal column. Her physician told her that she most likely would regain the use of her arm but her legs would be paralyzed. Why did he say that? Explain the differences in the neuron structures.

If there were lesions on a bundle of myelinated fibers, what would occur?

Name and describe the three parts of the neuron.

Spinal nerves are considered part of the PNS.

After a stroke, there is usually some damage to brain tissue. What type of neuroglia would you expect to find invading the affected area?

One of the components of the blood-brain barrier is:

Multiple sclerosis is the most common primary disease of the CNS.