AP BIOLOGY

Detailed explanation-1: -This spread of particles through random motion from an area of high concentration to an area of lower concentration is known as diffusion.

Detailed explanation-2: -In passive transport, substances move from an area of higher concentration to an area of lower concentration in a process called diffusion. A physical space in which there is a different concentration of a single substance is said to have a concentration gradient.

Detailed explanation-3: -facilitated diffusion. Facilitated diffusion is a type of passive diffusion, meaning it involves the movement of solute particles from an area of higher concentration to an area of lower concentration without requiring the assistance of energy.

Detailed explanation-4: -In passive transport, substances simply move from an area of higher concentration to an area of lower concentration, which does not require the input of energy. Concentration gradient, size of the particles that are diffusing, and temperature of the system affect the rate of diffusion.

Detailed explanation-5: -There are two main modes of transport of molecules across any biological membrane. These are passive and active transport. Passive transport, most commonly by diffusion, occurs along a concentration gradient from high to low concentration. No energy is necessary for this mode of transport.