Cell Membrane and Cell Transport

Front

What is the cell membrane?

Back

The cell membrane is a biological barrier that separates the interior of the cell from the external environment, controlling the movement of substances in and out of the cell.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses specific proteins to help move molecules across the cell membrane without using energy.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP) to do so.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell and leading to cell shrinkage.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell and potentially leading to cell swelling or bursting.

Front

What is isotonic solution?

Back

An isotonic solution has an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.

Front

What is the role of transport proteins?

Back

Transport proteins assist in the movement of substances across the cell membrane, either by facilitating passive transport or by actively transporting molecules using energy.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is equilibrium in the context of cell transport?

Back

Equilibrium occurs when the concentration of a substance is equal on both sides of the cell membrane, resulting in no net movement of that substance.