The chemical process that creates molecules out of smaller components with the help of energy is ________.

The process by which drugs affect the cells in the body by interacting with drug receptors can be compared to a(n):

a. Lock and key. b. Homing device. c. Histamine reaction. d. Flow chart.

While you are putting wood into your wood stove, your hand comes in contact with the hot surface. Your body responds by pulling your hand away from the heat. How is this action accomplished?

a. One or more skeletal muscles receive a signal from the brain to contract. b. The smooth muscles in the arm automatically respond to heat. c. You use conscious thought to pull your hand from the heat. d. Extension of the ligaments in the elbow joint pulls the lower arm up.