Front

What is the primary function of the cell membrane?

Back

The cell membrane regulates what enters and leaves the cell, maintaining homeostasis.

Front

Define diffusion in biological terms.

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process that allows substances to cross membranes with the assistance of special proteins.

Front

Give an example of a substance that uses facilitated diffusion.

Back

Glucose is an example of a substance that uses facilitated diffusion to enter cells.

Front

What does 'high concentration area' refer to?

Back

A high concentration area refers to a region where molecules are tightly packed together.

Front

What role do transport proteins play in facilitated diffusion?

Back

Transport proteins help specific molecules cross the cell membrane without using energy.

Front

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion does not require assistance from proteins, while facilitated diffusion does.

Front

How does temperature affect the rate of diffusion?

Back

Higher temperatures increase the kinetic energy of molecules, leading to a faster rate of diffusion.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water leaves the cell, causing it to shrink.