GB: 24 Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

What is diffusion?

Back

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

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a membrane via specific transmembrane integral proteins.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances along their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What are the types of passive transport?

Back

The main types of passive transport are simple diffusion, facilitated diffusion, and osmosis.

Front

What is an example of simple diffusion?

Back

An example of simple diffusion is the exchange of CO2 and O2 in the lungs.

Front

What does it mean for a solution to be hypertonic?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, leading to water moving out of the cell.

Front

What does it mean for a solution to be hypotonic?

Back

A hypotonic solution has a lower concentration of solutes compared to another solution, leading to water moving into the cell.

Front

What is equilibrium in the context of cell transport?

Back

Equilibrium is the state where the concentration of a substance is equal on both sides of a membrane, resulting in no net movement.