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...

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 be

a. a nucleus.

b. a ganglion.

c. a nerve.

d. a tract

What is not affected by the parasympathetic division of the autonomic nervous system?

a. Adrenal medulla

b. Heart rate

c. Iris

d. Sweat glands