GENERAL HISTOLOGY

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: -In active transport, the molecules move against the concentration gradient whereas in passive transport, the molecules move along the concentration gradient.

Detailed explanation-3: -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-4: -Types of passive transport: Solutes travel from a location of greater concentration to a region of lower concentration by simple diffusion. Solutes travel through a membrane from higher to lower concentrations with the help of transmembrane proteins in facilitated diffusion.

Detailed explanation-5: -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.