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Lecture

Cell membranes lecture notes.docx

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Department
Biology
Course
BIO1140
Professor
A L L
Semester
Fall

Description
Cell membranesChapter 5Functions of Cell MembranesoFluid mosaic modelSingerNicholson 1972Fluid lipid molecules in which proteins are embedded and freely floatingoFunctions 1 Define boundaries selectively permeable barrier lipid soluble molecules can cross the membrane easily water soluble molecules cannot cross2 Localisation and organisationScaffold for biochemical activities enzymeseg mitochondria responsible for reactions that synthesize ATP and this involves many proteins and they can be organized into a certain group so that they are all nicely organized together on a membraneRegulation of solute transportActive role of moving things In and out of cell andor organellesUphill or downhillKATPasecan move solutes across the membrane that eg Nanormally wouldnt be able to crossResponses to external signalsReceptors and signal transductioneg adrenoreceptorneed to be able to recognize and respond to other cells around themCelltocell communication
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