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Cellular Physiology Chapter 2
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The cell theory has six principles. The cell is the smallest structural and functional unit capable of carrying out life processes. The functional activities of each cell depend on the specific structural properties of the cell. Cells are the living building blocks of all plant and animal organisms.
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Cell Principles Con’t All organism’s structure and function ultimately depend on the individual and collective structural characteristics and functional capabilities of its cells. All new cells and new life arise only from pre-existing cells. Because of this continuity of life, the cells of all organisms are fundamentally similar in structure and function.
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The plasma membrane bounds the cell. It separates the ECF (extra-cellular fluid) and ICF (intra-cellular fluid). It gives the cell its structure (i.e. it defines that structure as that cell). It controls the passage of substances into and out of the cell.
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Rough endoplasmic reticulum Microfilament Lysosome Mitochondrion Vault Centriole Microtubule Ribosomes Exocytotic vesicle Golgi complex Cytosol Peroxisome Endocytotic vesicle Smooth endoplasmic reticulum Plasma membrane Nucleus
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CELL COMPONENTS Nucleus Cytoplasm Cytoskeleton
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THE NUCLEUS The nucleus contains DNA and specialized proteins enclosed by a double-layered membrane. DNA codes for the synthesis of structural and enzymatic proteins. The DNA is the blueprint for cell replication.
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THE CYTOPLASM consists of organelles and the cytosol. Organelles are separate, membrane-bound compartments, capable of reproducing. Organelles include the:
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This note was uploaded on 05/02/2010 for the course PHYSIO EXERCISE P taught by Professor Gil during the Spring '10 term at UCSB.

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view-1.php - Cellular Physiology Chapter 2 The cell theory...

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