1. Cells!

2. Cell theory Everything Is made from cells!
Many different types of cells!

3. White blood cells

4. Onion epidermal cells

5. Breast Cancer Cells

6. Overview of cells
Plasma membrane – defines boundary of cell and regulates chemical traffic between cells and walls
Nucleus - houses cell DNA – genetic material
Cytoplasm – region between nucleus and plasma membrane
Contains fluid and organelles
Made of water
Organelle – parts of cell that have specific function
Plasma membrane - think of a door and wall.. The door regulates where it goes
Each cell

7. Notice major differences
Chlorplasts
Plants have cell walls – made of chitin and cellulose

8. Two types of cells
Prokaryotic cells - do not have nucleus and organelles
Bacteria
Archaea – “extremeophiles”
Eukaryotic cells – have a true nucleus

9. Membrane Structure Organization Isolate teams of enzymes
Regulate transport
Mainly of proteins and phosphlipids
Polar and nonpolar
Membranes keep functions of eukaryotic cell organized
Isolate enzymes
Regulate transport of substances across the boundary
Phspholi[ds have phostphate group (PO4 3-) attracted to water – negatively charge
Hydrophobic head Hydrophobic tail (nonpolar)

10. Phospholipid bilayer
Phosphate ends face water (hydrophilic and inside cell – cytoplasm)
Hydrophobic ends inside, away from water!
Nonpolar molecules such as Oxygen and Carbon dioxide pass through easily whereas polar molecules cannot!
Dynamic structure – always moving

11. Functions of Membrane Proteins
Enzyme Activity
Cell to cell recognition
Communicate (search for pathogens)
Cell signaling
Informing other cells
Transport of materials