Cells - Cells: The Living Units Cells: the basic structural...

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Cells: The Living Units Cells: the basic structural & functional units of living things - plasma membrane : flexible outer surface of cell; selective barrier that regulates flow of materials into & out of cell – maintains internal environment - cytoplasm : all cellular contents between plasma membrane & nucleus - contains organelles function (e.g.: mitochondria, chloroplasts, lysosomes) in cytosol (semifluid medium between nucleus and plasma membrane) - nucleus : large organelle that stores DNA in the form of chromosomes containing genes - cell wall in plant cells, fungi, protists, bacteria… for this course we’ll focus on animal cells, which have no cell wall Plasma membrane: outer boundary of cells (except plant cells – also cell wall) - phospholipid bilayer : semipermeable and selectively permeable - functions in regulation of passage of molecules into and out of the cell Fluid Mosaic Model: the membrane is a fluid phospholipid bilayer, capable of lateral
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Cells - Cells: The Living Units Cells: the basic structural...

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