chapter 02 cells the living units

chapter 02 cells the living units - Plasma (cell) Membrane...

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1 Cells: the living units Chapter 2 Cytology History of cellular research Cells Metabolism Cellular function – nutrients –oxygen – ability to eliminate wastes Cells The cell is the most basic unit of human life. – alive – most reproduce – most live in a liquid environment Cellular diversity – many different functions – we’ll study what most cells have Common Characteristics Plasma (cell) membrane – protective barrier – pliable with small holes (permeability for metabolic processes) Cytoplasm – cytosol: clear, thick, elastic fluid (blood of cell) – contains cellular materials (organelles) – delivers nutrients and waste products Nucleus – controls chemical and reproductive activities Common characteristics
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Unformatted text preview: Plasma (cell) Membrane Mechanics of the Plasma membrane: bulk transport Mechanics of the Plasma membrane: bulk transport Cellular Replication Mitosis growth & replacement of damaged or worn cells 100 billion cells replaced each day Cellular Replication Constant epidermal, hemopoietic, lining of gastrointestinal tract As needed liver, kidneys Never muscle, nerve Cellular Adaptations Hypertrophy Atrophy A clinical consideration: Cancer Neoplasm uncontrolled growth resulting in tumors benign: slow, contained growth malignant: rapid growth with possibility of spreading ( metastasize) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
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This note was uploaded on 08/05/2011 for the course APK 2100 taught by Professor Dr.tillman during the Summer '07 term at University of Florida.

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