Two major cell groups make up the nervous system—neurons and supporting cells such as astrocytes and Schwann cells. Which are 'nervous' cells? Why? What are the major functions of the other cell group?

a. Contrast unipolar, bipolar, and multipolar neurons structurally.b. Indicate where each is most likely to be found.

Multiple ChoiceMore than one choice may apply.Histological examination of a slice of neural tissue reveals a bundle of nerve fibers held together by cells whose multiple processes wrap around several fibers and form a myelin sheath. The specimen is likely to bea. a nucleus.b. a ganglion.c. a nerve.d. a tract.

Multiple ChoiceMore than one choice may apply.Neuroglia present in large numbers in areas of bacterial infection in the brain are most likelya. oligodendrocytes.b. astrocytes.c. ependymal cells.d. microglia.

What is the basis for the functional classification of neurons?

Phagocytic cells in nervous tissue of the CNS are (a) astrocytes, (b) ependymal cells, (c) oligodendrocytes, (d) microglia.

The neural cells responsible for the analysis of sensory inputs and coordination of motor outputs are (a) neuroglia, (b) interneurons, (c) sensory neurons, (d) motor neurons.

Why can't most neurons in the CNS be replaced when they are lost to injury or disease?

Describe the stages of sleep and outline the order in which we progress through these stages during a typical night's sleep