Understanding Diffusion in Cells

The video explains diffusion, a process where molecules move from high to low concentration. It uses examples like food coloring in water and the aroma of apple pie to illustrate diffusion. The importance of diffusion in cellular processes is highlighted, showing how substances move across cell membranes. The concept of selective permeability is also introduced, explaining how cell membranes allow certain molecules to pass through.

What is the process called when molecules move from an area of higher concentration to an area of lower concentration?

• Filtration

• Diffusion

• Absorption

• Osmosis

Which example illustrates diffusion in everyday life?

• Ice melting

• Apple pie smell spreading

• Water boiling

• Bread rising

Why is diffusion important for cells?

• It helps in cell division

• It provides energy to the cell

• It helps in the movement of substances in and out of the cell

• It maintains cell structure

What characteristic of the cell membrane affects diffusion?

• Its thickness

• Its color

• Its temperature

• Its selective permeability

Which molecules are allowed to pass through the cell membrane?

• Only small molecules

• All molecules

• Only certain molecules

• Only large molecules