BIOLOGY 1101 Lecture Notes - Lecture 5: Active Transport, Osmosis, Extracellular Fluid
16 Sep 2016
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The smallest unit of life that can function independently and perform all the necessary functions of life, including reproduction. o o o. All living organisms are made up of one or more cells. Surface area to volume ratio too small= decreased rate of chemical exchange= cells die o o o o o o o o o. Every cell is bordered by a plasma membrane made of phospholipids. Two layered membrane that holds the cell together, and regulates what goes in and out. Provides additional protection and support for plant cells. Molecules embedded within the cell membrane helps it perform its functions. Found in plasma membrane allow specific molecules in and out, or perform chemical reactions. Cells with improper fingerprint are foreign and attacked by bodies defense. The spontaneous diffusion of molecules across a membrane. Most molecules cannot get through membrane on their own. Solution concentrations are lower in the extracellular fluid. Solution concentrations are higher in the extracellular fluid.
