Chapter 3-Cellular Level of Organization.pdf - CHAPTER 3:...

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CHAPTER 3: THE CELLULAR LEVEL OFORGANIZATIONHuman Anatomy and Physiology IDr. Jenny Harper
THE CELL MEMBRANEoThe cell membrane or plasma membrane covers and protects every cell in our bodyoThe function of the plasma membrane is to act as a barrier and separate theinternal environment of the cell from the external environment outside the cell
STRUCTURE AND COMPOSITION OF THE CELLMEMBRANEPhospholipid bilayerPhosphate “head”Lipid “tail”Hydrophobic and hydrophilic sides areformed
PHOSPHOLIPID BILAYERLipid tails of one layer face the lipidtails of another layerPhospholipid heads face outwards fromeach other on opposite ends
MEMBRANE PROTEINSIntegral proteinsPeripheral proteins
PASSIVE TRANSPORTConcentration gradientsDiffusion
FACILITATED DIFFUSIONUsed for substances that cannot cross thelipid bilayer due to their size, charge,and/or polarity
OSMOSIS

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Term
Fall
Professor
NoProfessor
Tags
Cell Cycle, Mitosis, Dr Jenny Harper

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