AP BIOLOGY

Detailed explanation-1: -Exocytosis (exo = external, cytosis = transport mechanism) is a form of bulk transport in which materials are transported from the inside to the outside of the cell in membrane-bound vesicles that fuse with the plasma membrane.

Detailed explanation-2: -Exocytosis is the process by which cells move materials from within the cell into the extracellular fluid. Exocytosis occurs when a vesicle fuses with the plasma membrane, allowing its contents to be released outside the cell.

Detailed explanation-3: -Osmosis is the transport of small molecules through a semipermeable membrane based on solute or solvent concentration on opposite sides of the membrane.

Detailed explanation-4: -Plasma membrane controls the flow of substances in and out of cell.

Detailed explanation-5: -Active transport: moving against a gradient To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells.