In a person with ________, a condition that can lead to complications such as anemia, heart failure, and increased mental confusion, the thyroid gland is underactive.

The layer containing important sensory nerves and support structures such as the hair follicles, sweat glands, and oil glands is known as the:

A) epidermis. B) subcutaneous. C) coagulation. D) dermis.

The meningitis vaccine covers what percentage of cases in the United States?

A) 50% B) 75% C) 25% D) 100%