AP BIOLOGY

Detailed explanation-1: -Cell transport helps cells maintain homeostasis by keeping conditions within normal ranges inside all of an organism’s cells. If homeostatic mechanisms fail, homeostatic regulation may fluctuate and disease or death of a cell or organism can follow.

Detailed explanation-2: -Homeostasis is a state of balanced equilibrium, where everything is running smoothly. The plasma membrane maintains homeostasis in the cell by keeping cell contents in and foreign material out, and by providing controlled avenues for the transportation of fuel, fluids and waste.

Detailed explanation-3: -Diffusion is an important process in human physiology. Specifically, diffusion is the mechanism of movement of oxygen, nutrients and other molecules across the capillary walls and the movement of other molecules across membranes.

Detailed explanation-4: -Even when equilibrium is reached, particles do not stop moving across the cell membrane. Although it may seem as if the concentrations are not changing, nearly equal numbers of particles cross the membrane in both directions. This means that there is no net change in the concentration of the substances.