AP BIOLOGY

Detailed explanation-1: -Diffusion is the movement of particles from a higher concentration to a lower concentration. That’s why, when you spray perfume in the corner of a room, you will eventually smell it on the other side of the room. The perfume molecules are diffusing through the air molecules, which allows the scent to spread.

Detailed explanation-2: -An excellent example of facilitated diffusion is the transport ofd-glucose into skeletal muscle and adipose cells by theGLUT4 transporter. Glucose transport can proceed as long as the blood concentration of glucose is higher than the intracellular concentration of glucose and as long as the carriers are not saturated.

Detailed explanation-3: -Examples of Diffusion: Examples of diffusion include perfume filling a whole room and the movement of small molecules across a cell membrane.

Detailed explanation-4: -Active transport is in a direction opposite to that of diffusion.