If a cell were a house, the plasma membrane would be walls with windows and doors. Moving things in and out of the cell is an important role of the plasma membrane. It controls everything that enters and leaves the cell. There are two basic ways that substances can cross the plasma membrane: passive transport, which requires no energy; and active transport, which requires energy.

This is a re-posting of the notes I originally posted on reddit from a general cell biology class I took in spring 2011. I re-scanned them after signing all of them at the suggestion of another red…

aasgaduli.blogspot.com: Transport across the cell membrane

A little osmosis..in a GIF! By The Amoeba Sisters

Cell Transport Worksheet Answers. Cell Transport Worksheet Answers. Cell Transport Worksheet Cell Membrane

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Mass transfer of materials through the cell membrane occurs by changes in the plasma membrane at localized sites. It involves 2 processes, endocytosis, and exocytosis. Endocytosis is the process of ca

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