The chemical messengers that stimulate the body's organs and help to maintain the body's internal environment (its milieu) are called ____.

In the word enteral, the prefix en- means:

A) In. B) Within. C) Without. D) Between, among.

The satisfaction and commitment of firefighters to their jobs as compared to other occupations is said to be:

A) high. B) very high. C) very low. D) low.