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cell-outline - The Cell page 1 of 6 ANAT 11110 Fall 2011...

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The Cell page 1 of 6 ANAT 11110 Lectures 8, 9, & 10 Fall 2011 The Cellular Level of Organization I. Introduction: All living things are composed of cells; Cell Theory A. Cells are the basic units/building blocks of the body B. Cells account for the shape, organization, and construction of the body II. Bodily cells have much in common, but also differ widely A. Differences 1. Size 2. Shape/structure and function B. Cell components 1. Cell membrane a. Composition: double layer of phospholipids [aka, plasma membrane] with large globular protein molecules scattered throughout b. Regulation of substance passage into and out of cell i. Diffusion: passive movement of substances from regions of high concentration to regions of low concentration a'. Osmosis: passive movement of water molecules across a semi-permeable membrane ii. Filtration: forced movement of fluid across a membrane whose pores restrict the passage of solutes based on their size iii. Carrier-mediated transport: movement of a substance across the cell membrane by means of a protein carrier a'. Facilitated diffusion: passive movement along a concentration gradient
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The Cell page 2 of 6 b'. Active transport: ATP-driven movement against a concentration gradient iv. Vesicular transport a'. Endocytosis: transports substances into the cell i'. Pinocytosis: vesicular movement of fluids ii'. Phagocytosis: vesicular movement of extracellular substances iii'. Receptor-mediated endocytosis
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cell-outline - The Cell page 1 of 6 ANAT 11110 Fall 2011...

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