CH 3 - The Cellular Level of Organization.pdf - CH 3: The...

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CH 3: The Cellular Level of OrganizationINTRODUCTIONCells:the basic structural and functional units of all living organisms.oLife begins at the cellular levelCytology: is the study of cell structureCell physiology: study of cell functionAll cells come from preexisting cellsPresentation cover the various cell “parts” (anatomy of the cell) and thefunctions of those parts.The presentation also covers cell division: mitosis and meiosisTYPICAL HUMAN CELLSTHE CELL MEMBRANE
Structure: fluid mosaic modelFunction: delimits the cell and partition fluidsFluid mosaic model:oRole: responds to the stimulusoCholestrol: keeps the cell shapeoGlycolipids: cellular recognitionoWhat does phospholip by layer do in the fluid Mosaic model for cellmembrane?Delimits the cell and partition fluids-semi permebalemembrane
In the phospholid by layer the head ishydrophilicIn the phospholipid by later the tail ishydrophobicMEMBRANE PROTEINS AND THEIR FUNCTIONSThe membrane proteins are in two places: integral or peripheraloIntegral proteinsextend into and across the entire phospholipidbilayer (among the fatty acid tails)oPeripheral proteinsare found at the inner and outer surfaces of themembraneBoth types regulate the entry and exit of materials to and from the cell(Gates!) =Transport ProteinsAnother type of protein present in the membrane areSignaling orReceptor Proteins(not labelled on Fig 3.4)Lastly, there are proteins in the membrane involved in cellular recognition(Glycolipids)In the cell membrane what controls the movement of specific molecules?Transport proteins
What controls when hormones bind to specific receptors to make stuff

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Term
Fall
Professor
Watson
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