What part of the cell is outlined in black? What part of the cell (circled) are the red lines pointing to? Type only the name of the part (Ex. mitochondrion NOT the mitochondrion).

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper