MICROANATOMY

Detailed explanation-1: -The net flow of molecules is always down their concentration gradient-from a compartment with a high concentration to one with a lower concentration of the molecule.

Detailed explanation-2: -There is a form of passive transport called facilitated diffusion. It occurs when molecules such as glucose or amino acids move from high concentration to low concentration facilitated by carrier proteins or pores in the membrane.

Detailed explanation-3: -Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. For cell transport, diffusion is the movement of small molecules across the cell membrane.

Detailed explanation-4: -Over time, the food coloring spreads from the region of high concentration into the region of low concentration, turning the whole cup of water purple. Another good example is how cream diffuses through a cup of coffee. It starts in an area of high concentration and then gradually moves into areas of low concentration.