the 3 basic components of the cell theory : the 3 basic components of the cell theory : 1. all...
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• The 3 Basic Components of the Cell The 3 Basic Components of the Cell Theory :Theory :
• 1. All organisms are composed of one 1. All organisms are composed of one or more cells. (Schleiden & Schwann)or more cells. (Schleiden & Schwann)(1838-39)(1838-39)
• 2. The cell is the basic unit of life in all 2. The cell is the basic unit of life in all living things. (Schleiden & Schwann)living things. (Schleiden & Schwann)(1838-39)(1838-39)
• 3. All cells are produced by the 3. All cells are produced by the division of preexisting cells. (Virchow)division of preexisting cells. (Virchow)(1858)(1858)
Modern Cell Theory contains 4 statements, in addition to the original Cell Theory:
1. The cell contains hereditary information(DNA) which is passed on from cell to cell during cell division.
2. All cells are basically the same in chemical composition and metabolic activities.
3. All basic chemical & physiological functions are carried out inside the cells.(movement, digestion, etc)
4. Cell activity depends on the activities of sub-cellular structures within the cell(organelles, nucleus, plasma membrane)
Organelle= “little organ”
Membrane bound only inside eukaryotic cells
Cytoplasm – Jelly-like substance inside the cell where all other organelles are suspended. Allows for movement of substances
Boundary of the cell: Semi-permiable (maintains Homeostasis/Equilibrium)
Made of a phospholipid bilayer
Found in plant and bacterial cells
Rigid, protective barrier – gives cell shape
Located outside of the cell membrane
Made of cellulose (fiber)
“Control Center” of the cell – controls all functions in the cell (the cell’s brain)
Contains DNA Surrounded by a
double membrane
“Powerhouse of the cell”
Cellular respiration occurs releasing energy for the cell to use
Bound by a double membrane
Has its own strand of DNA
Found only in plant cells
Contains the green pigment chlorophyll which captures solar(radiant) energy for photosynthesis
Site of food (glucose) production
Bound by a double membrane
Large central vacuole usually in plant cells
Many smaller vacuoles in animal cells
Storage container for water, food, enzymes, wastes, pigments, etc.
Garbage disposal of the cell
Contain digestive enzymes that break down wastes
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