The nervous system as a whole is divided into how many main subdivisions?

What nervous system controls the voluntary functions of the five senses?

The largest and most complex organization of nerve tissue in the body is the _____.

The simplest form of nervous activity that includes a sensory and motor nerve is called a(n) _____.

The whitish cords made up of bundles of nerve fibers, held together by connective tissue that make up the nervous system are called _____.

Blood is generally bright red in the arteries and dark red in the veins. What accounts for the difference in color?

The word integument means _____.

Insulin, adrenaline, and estrogen are examples of _____.

Which gland plays a major role in sexual development, sleep, and metabolism?

How might a cosmetologist notice changes in a client’s thyroid function?

Which organ is part of the female reproductive system?

The primary male reproductive hormone is _____.

Acne, loss of scalp hair, facial hair growth and color, and darker skin pigmentations are some of the results of changing or fluctuating _____.