Hormones produced in the pituitary gland that reduce the sensation of pain and effect emotions are know as
a. pain killers
b. testosterone
c. endorphins
d. none of the above

What are the pros and cons of transect sampling?

Are the layers of rock above and below the coal older or younger?

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. once a virus gains entry into the body, it invades a host cell in order to? a. synthesize antibodies for defense b. deactivate the host cell's defenses c. access cell processes for reproduction d. metabolize host proteins and grow