What is active transport? A. A process that moves molecules from high concentration to low concentration.
B. A process that moves water in and out of the cell with the concentration gradient until equilibrium is reached.
C. A process that uses ATP to move molecules across a membrane and often against their concentration gradient.
D. A process that transports materials in and out of the cell without energy.

Patricia is told by her physician that her body and brain chemistry have physically adapted to the drug and that she has become dependent on the tranquilizers prescribed for her by another doctor.

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Resperation is a way to release carbon back into the atmosphere