CELLS Cell Theory The cell is the basic
CELLS
Cell Theory The cell is the basic unit of Life. (Structure and Function). All living things are made up of cells. All cells come from Pre-existing cells.
Discovery of Cells Robert Hooke (mid-1600 s) Observed Saw sliver of cork “row of empty boxes” Coined the term cell
Prokaryote VS. Eukaryote Cell Prokaryote Both Eukaryote Small DNA Large No membrane organelles Ribosomes Membrane bound organelles No nucleus Plasma membrane Nucleus Bacteria Cytoplasm Animal and Plants Cell wall
Eukaryotes: Animal VS. Plant Cell Animal BOTH Plant Lysosomes Nucleus Cell Wall Flagella Golgi Apparatus Central Vacuole Centrioles (cell division) Ribosomes Chloroplast Rough and Smooth ER Plasma Membrane Mitochondria
Animal Cell
Plant Cell
Organelles:
Plasma Membrane:
Structure of Membrane Made up of 2 layers of phospholipids Head: Hydrophilic Tails: Hydrophobic
Function of Membrane ü Protective barrier ü Regulate transport in & out of cell (selectively permeable) ü Allow cell recognition ü Provide anchoring sites
Passive Transport: (NO ENERGY) Diffusion: Substances move from High to Low concentration Osmosis: Water moves from High to Low concentration (amount) Facilitated Diffusion: Substances move from High to Low but with the aid of a protein (facilitated) *ALL MOVE HIGH TO LOW
Active Transport: (ENERGY/ATP) Moves from Low to High (against concentration gradient) Phagocytosis: cell eating
- Slides: 15