Cell 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 they are evenly distributed.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

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.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What does isotonic mean?

Back

Isotonic refers to a solution that has the same concentration of solutes as another solution, resulting in no net movement of water.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives diffusion.

Front

Why is diffusion important for cells?

Back

Diffusion allows cells to take in necessary materials and substances without expending energy.

Front

What happens during osmosis?

Back

During osmosis, water molecules move across a membrane to balance solute concentrations on both sides.

Front

What is the role of the cell membrane in transport?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.

Front

What is an example of active transport?

Back

An example of active transport is the sodium-potassium pump, which moves sodium out of the cell and potassium into the cell against their concentration gradients.