CELL STRUCTURE AND FUNCTION-Chapter 3

I-Cells- basic units of life
all organisms composed of cells
all from pre-existing cells
smallest unit having properties of life

II-Cell properties
cell membrane
DNA
cytoplasm

III-Cell types
prokaryotes- bacteria
eukaryotes- plants, animals, molds
viruses are not cells

IV-Cell Membranes
lipid bilayer
fluid mosaic model
permeability characteristics
proteins in membrane give specific properties

V-Diffusion- movement of molecules from high to low concentration
    osmosis (net movement of water molecules through membrane)
    hypotonic
    hypertonic
    isotonic

VI-Carrier-mediated transport
    passive transport
    active transport

VII-Bulk transfer
    endocytosis
    exocytosis
    phagocytosis

VIII-Cytoskeleton
    microtubules
    intermediate filaments
    microfilaments

    Cilia and Flagella

IX-Nucleus
    chromosomes
    nucleolus
    nuclear envelope

X-Ribosomes
    protein synthesis

XI-Cytomembrane System
    endoplasmic reticulum
    Golgi bodies
    vesicles
      peroxisomes
      lysosomes

XII-Mitochondria
    energy production (ADP converted to ATP)
    Oxygen utilization
    inner and outer membranes

XIII-Enzymes
    metabolic pathways
    protein catalysts
    “-ase”
    temperature and pH dependent

XIV-Cell energy
    ATP as a "rechargeable" energy storage
    anabolism
    catabolism
    release of potential energy
    ATP production

XV-Anaerobic glycolysis
    in cytoplasm
    pyruvic acid (pyruvate)
    lactic acid
    NADH2

XVI-Aerobic respiration
    in mitochondria
    Krebs cycle
    electron transport
    block by cyanide

XVII-Interconversion of cell biomolecules