Cell Membrane

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, providing protection and support.

Front

What is diffusion?

Back

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

Front

Define osmosis.

Back

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

Front

What does 'hydrophobic' mean?

Back

Hydrophobic means water fearing; it describes substances that do not mix well with water.

Front

What is a phospholipid?

Back

A phospholipid is a molecule that makes up the cell membrane, consisting of a hydrophilic (water-loving) head and two hydrophobic (water-fearing) tails.

Front

What is the structure of the cell membrane?

Back

The cell membrane is composed of a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates.

Front

What is facilitated diffusion?

Back

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

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.

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 does 'selectively permeable' mean?

Back

Selectively permeable means that the cell membrane allows certain substances to pass while blocking others.