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: -Passive transport describes the movement of substances across a cell membrane down their concentration gradients, which does not require energy. Cell membranes are selectively permeable, so only certain substances can passively diffuse directly across the membrane.

Detailed explanation-3: -Diffusion: Diffusion is the movement of particles from an area of higher concentration to lower concentration.

Detailed explanation-4: -Some substances (small molecules, ions) such as carbon dioxide (CO2) and oxygen (O2), can move across the plasma membrane by diffusion, which is a passive transport process.

Detailed explanation-5: -Passive transport is a type of cellular transport in which substances such as ions and molecules move down their respective concentration gradients. It means that the substance tends to move from an area of higher concentration to an area of lower concentration.