Cell membrane and Transport

Front

What is diffusion?

Back

Diffusion is the process when molecules move from a high concentration to a low concentration.

Front

What is the hydrophobic region of the cell membrane?

Back

The hydrophobic region of the cell membrane refers to the part that repels water, typically made up of fatty acid tails.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process where special proteins help move particles across the cell membrane without the need for energy.

Front

What type of solution is a cell in if it is in a hypertonic solution?

Back

In a hypertonic solution, the cell loses water and shrinks because the concentration of solutes outside the cell is higher than inside.

Front

What does the 'fluid mosaic model' describe about the cell membrane?

Back

The fluid mosaic model describes the cell membrane as a flexible pattern made up of various molecules, including phospholipids and proteins.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through 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 using energy, typically against their concentration gradient.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, maintaining the internal environment of the cell.

Front

What happens to a cell in an isotonic solution?

Back

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

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.