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.

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