EVERYDAY SCIENCE

Detailed explanation-1: -Passive transport does not require the cell to expend any energy and involves a substance diffusing down its concentration gradient across a membrane.

Detailed explanation-2: -One example of passive transport is diffusion, when molecules move from an area of high concentration (large amount) to an area of low concentration (low amount). Molecules are said to naturally flow down their concentration gradient.

Detailed explanation-3: -Generally, materials move with the concentration gradient (from an area of higher concentration to an area of lower concentration). This happens naturally without using any energy.

Detailed explanation-4: -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.