What is passive transport diffusion?

Answer 1

When there is a solution on either side of a barrier (membrane for example) withing a cell, the concentrations of said solution will be different on either side of the barrier. Concentrations do not like to be different and will move from high to low until they are equal.

For example, there are sodium ions on either side of a cell membrane. the concentration is higher inside, so to make the concentrations equal, some salt ions move through transmembrane proteins from the inside of the cell to the outside.

it's called passive because it doesn't use any energy

Answer 2

Passive transport means moving biochemicals and atomic or molecular substances across the cell membrane. Unlike active transport, this process does not involve chemical energy. The four main kinds of passive transport are diffusion, facilitated diffusion, filtration and osmosis.

Answer 3

Passive transport refers to the movement of biochemicals or other atomic substances across a membrane. Passive transport differs from active transport in that it doesn't require the input of any additional chemical energy.

Answer 4

it is a transportation mechanism that required concentration gradient but not energy as a source of ATP