GENERAL HISTOLOGY

Detailed explanation-1: -Passive transport is a naturally occurring phenomenon and does not require the cell to expend energy to accomplish the movement. In passive transport, substances move from an area of higher concentration to an area of lower concentration in a process called diffusion.

Detailed explanation-2: -Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.

Detailed explanation-3: -Diffusion is a type of passive transport, where molecules move from high concentration to low concentration.

Detailed explanation-4: -There are three passive transportation methods-diffusion, facilitated diffusion and osmosis.

Detailed explanation-5: -Simple Diffusion. Facilitated Diffusion. Filtration. Osmosis.