Which cells are most likely to react in the event that there is a reduction in the supply of oxygen to a person’s foot?
epithelial cells, neurons
neurons, muscle cells
muscle cells, blood cells
blood cells, epithelial cells

The study of interaction between living organisms and their enviroment is called (a) phytogeography (b) ecology (c) phytosociology (d) ecosystem

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes