cell membrane transport

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

Define isotonic solution.

Back

An isotonic solution has the same concentration of solutes as another solution, resulting in no net movement of water across the cell membrane.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What is passive transport?

Back

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

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (ATP) to do so.

Front

Define hydrophobic and give an example.

Back

Hydrophobic means 'water-fearing.' An example is the lipid tails in the phospholipid bilayer of the cell membrane.

Front

Define hydrophilic and give an example.

Back

Hydrophilic means 'water-loving.' An example is the phosphate heads in the phospholipid bilayer of the cell membrane.

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 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 osmosis?

Back

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