Transport of Substances in and out of Cells: Diffusion, Osmosis, and Active Transport

The video tutorial explains essential cell processes, focusing on three main transport mechanisms: diffusion, osmosis, and active transport. Diffusion involves the movement of particles from high to low concentration, influenced by factors like temperature and surface area. Osmosis is the diffusion of water through a partially permeable membrane. Active transport moves substances against the concentration gradient, requiring energy. The importance of surface area to volume ratio in cell transport is also discussed, with examples from single-cell and multicellular organisms.

What is diffusion and how does it relate to the transport of oxygen and carbon dioxide in cells?

Explain how temperature affects the rate of diffusion.

Describe the significance of surface area to volume ratio in single-celled organisms.

How are the gills of a fish adapted for efficient gas exchange?

What is osmosis and how does it differ from diffusion?

What role does a partially permeable membrane play in the process of osmosis?

Define active transport and provide an example of its importance in cells.