La membrana celular

The video tutorial explains the cell membrane's vital roles, including containing cell elements and regulating substance entry and exit. It highlights the membrane's selective permeability, allowing specific molecules like glucose to pass while removing waste. The tutorial covers passive transport methods, diffusion and osmosis, where substances move without energy. It also discusses active transport, requiring energy to move substances against a concentration gradient, facilitated by carrier proteins. The importance of the membrane in cell functions and life is emphasized.

What are the two vital functions of the cell membrane?

Explain the concept of selective permeability in the context of the cell membrane.

Describe the process of diffusion and how it relates to the movement of molecules across the cell membrane.

What is osmosis and how does it differ from diffusion?

What role do carrier proteins play in active transport across the cell membrane?