BIOLOGY - Cells - Diffusion and Osmosis

This video tutorial explores the movement of substances in cells through diffusion, osmosis, and active transport. It explains how diffusion allows particles to move from high to low concentration, using examples like gas exchange in lungs and nutrient absorption in intestines. Osmosis, the movement of water across membranes, is discussed with its effects on plant and animal cells. The video concludes with a preview of active transport, to be covered in the next part.

What are the three methods of transport discussed in the introduction?

• Endocytosis, Exocytosis, and Phagocytosis

• Photosynthesis, Respiration, and Transpiration

• Diffusion, Osmosis, and Active Transport

• Conduction, Convection, and Radiation

Which process allows the smell of a cake to spread throughout a room?

• Diffusion

• Active Transport

• Osmosis

• Facilitated Diffusion

What is required for facilitated diffusion to occur?

• Energy from ATP

• A high concentration of water

• A strong cell wall

• Carrier proteins

What happens to animal cells when they lose water through osmosis?

• They become turgid

• They burst

• They remain unchanged

• They shrivel up

Which of the following is an example of osmosis in plants?

• Gas exchange in leaves

• Absorption of water by roots

• Movement of glucose into cells

• Diffusion of oxygen into blood