Neural Tissue Chapter 11 Review

The two types of cells of the nervous system are

neurons and neurolgia

Gaps or interruptions in the myelin sheath are called

nodes of Ranvier

Multiple sclerosis is a neurological disorder in which myelin sheaths in the CNS are destroyed. Which of the following neuroglial cells is being damaged in multiple sclerosis?

oligodendrocyte

which cells produce myelin in the brain in spinal cord?

oligodendrocytes

A neuron may have

one axon and many dendrites.

Neurotransmitters are released from the

presynaptic terminal

Dendrites on unipolar neurons are part of

sensory neurons

The motor (efferent) division of the peripheral nervous system

transmits impulses from the CNS to skeletal muscle.

A myelinated nerve fiber is ___, whereas an unmyelinated nerve fiber is____.

white, and composing the white matter of the brain and spinal cord; gray, and composing the gray matter of the brain and spinal cord.

Which of the following statements regarding neuralgia is false?

Neuroglia form part of the blood-brain barrier

Which of the following cells is only found in the PNS?

Schwann cell

Every neuron has

a cell body

Myelin

compromises much of the cell membrane of Schwann cells

The sensory (afferent) division of the peripheral nervous system

conveys action potentials to the CNS.

The cytoplasmic extensions that, together with the cell body, provide the many receptive surface for neurons are

dendrites

Clusters of neuron cell bodies are called___.

ganglia

Myelin is rich in ___.

lipids

Which of the following is(are) a type of neuroglia?

-astrocyte -oligodendroctye -ependymal cell -schwann cell

The nervous system

-detects changes in the internal or external environment. -controls the movement of muscles -regulates secretion -integrates information from several sources and uses it to respond appropriately.

Which of the following neuroglia is not part of the CNS?

Satellite cells

Microglia

are phagocytic cells in the CNS.

Synaptic knobs are at the ends of

axons

Neurons that have a single axon and a single dendrite are

bipolar

The central nervous system

is the site for processing information.

The central nervous system includes the

spinal cord