the cell: an overview chapter 5. cell theory: fundamental to life all organisms are cellular cell:...
TRANSCRIPT
The Cell: An Overview
Chapter 5
Cell Theory: Fundamental to Life
All organisms are cellular
Cell: the smallest unit of life
Cells come only from preexisting cells
Examples of Cells
Fig. 5-2, p. 92
Animation: Overview of cells
Fig. 5-4a, p. 94
Bright field microscopy
Fig. 5-4b, p. 94
Dark field microscopy
Plasma Membrane
Fig. 5-6, p. 95
Animation: Cell membranes
Plasma Membrane
Plasma membrane defines cytoplasm
Lipid bilayer and proteins
Hydrophobic• Selective passage hydrophilic
Internal environment of cell different from external
Typical Plant Cell
Fig. 5-9a, p. 100
Electron Micrograph Plant Cell
Fig. 5-9b, p. 100
Microbodies
Fig. 5-17, p. 107
Fig. 5-17, p. 107 (removable labels)
CytosolLargecentralvacuole
Chloroplast
Chloroplast
Cytoskeleton
Cytoskeleton • Maintains shape and organization
• Interconnected protein fibers and tubes
Most prominent in animal cells• Plants and fungi also use cell walls and central
vacuole
Cytoskeleton Examples
Fig. 5-18, p. 107
Cell Wall Structure
Fig. 5-25, p. 112
Extracellular Matrix
Fig. 5-27, p. 115
Video: Fluid mosaic model