EVERYDAY SCIENCE

Detailed explanation-1: -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-2: -In passive transport, particles (e.g. ions or molecules) are transported along the concentration gradient. This means that the particles move from areas of high concentrations to areas of low concentrations. Because of the passive movement of particles no chemical energy is spent as it takes place.

Detailed explanation-3: -Passive transport is defined as a type of transport that moves substances from an area of greater concentration to an area of lesser concentration. Thus, the movement of substances is along a concentration gradient.

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: -If movement is with the concentration or gradient, it is passive. If movement is against the gradient, it is active and requires energy.