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 the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy (ATP) to move substances against their concentration gradient.

Front

What is osmosis?

Back

Osmosis is 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 role of the cell wall in plant cells?

Back

The cell wall provides structural support and protection, and helps maintain the shape of the cell.

Front

What are phospholipids?

Back

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

Front

What does hydrophobic mean?

Back

Hydrophobic refers to substances that do not mix well with water; they are water-repelling.

Front

What does hydrophilic mean?

Back

Hydrophilic refers to substances that are attracted to water; they are water-attracting.

Front

What is the significance of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the cell membrane's structure, especially at extreme temperatures.

Front

What happens to a cell in a hypertonic solution?

Back

A cell placed in a hypertonic solution will lose water and shrink.

Front

What happens to a cell in a hypotonic solution?

Back

A cell placed in a hypotonic solution will gain water and may swell or burst.