National 5 Biology-Transport Across Cell Membranes

What is the cell membrane composed of?

What is the cell membrane known to be?

What is a concentration gradient?

Describe what passive transport of a substance is

Give two examples of passive transport

What is the difference between diffusion and osmosis?

Give three examples of substances that enter most cells through diffusion

Give two examples of substances that leave most cells through diffusion

Why is diffusion important?

Describe what active transport of a substance is

Why does active tranpsort require additional energy?

What happens to an animal cell in a hypotonic solution?

What happens to an animal cell in a hypertonic solution?

What happens to an animal cell in an isotonic solution?

What happens to a plant cell if it is placed in a hypotonic solution?

What happens to a plant cell placed in a hypertonic solution?

Describe the role of protein molecules in osmosis and active transport