EOC Review- Unit 2- Membrane, Cell Tonicity and Cell Transport

Front

What is a hypotonic solution?

Back

A solution that has a lower concentration of solutes compared to the inside of a cell, causing water to enter the cell.

Front

What is passive transport?

Back

The movement of particles across a cell membrane without the use of energy, typically from an area of high concentration to an area of low concentration.

Front

What are phospholipids?

Back

Molecules that make up the cell membrane, consisting of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails'.

Front

What is active transport?

Back

The movement of particles against their concentration gradient, requiring energy, usually in the form of ATP.

Front

What is a hypertonic solution?

Back

A solution that has a higher concentration of solutes compared to the inside of a cell, causing water to leave the cell.

Front

What is an isotonic solution?

Back

A solution that has the same concentration of solutes as the inside of a cell, resulting in no net movement of water.

Front

What role does energy play in active transport?

Back

Energy is required to move substances against their concentration gradient, which is not possible through passive transport.

Front

What happens to a plant cell in a hypotonic solution?

Back

Water enters the cell, causing it to swell and become turgid, which is beneficial for maintaining structure.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the fluidity of the cell membrane, making it less permeable to very small water-soluble molecules.