Net movement of particles from a region of higher concentration to a region of lower concentration down a concentration gradient due to random movement
Proteins in cell membranes carry out active transport by capturing molecules from one side of the cell, changing shape, and transporting the molecules to the other side using energy from respiration
Comparison between diffusion, osmosis, and active transport
Diffusion: particles move down a concentration gradient, energy from kinetic energy, Osmosis: water molecules move from high to low water potential, Active transport: particles move against a concentration gradient, energy from respiration
Movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration against a concentration gradient using energy from respiration
Also known as whisking tubing, a non-living partially permeable membrane with small pores allowing water to pass through but blocking large molecules like sucrose
Water moves from a region of higher water potential (dilute solution) to a region of lower water potential (concentrated solution) through a partially permeable membrane
Active transport is used when diffusion or osmosis cannot be relied upon, for example, when a cell needs to absorb extra nutrients despite having a higher concentration of those nutrients inside