2 nd Quarter Assessment Unicellular---Made up of one cell Multicellular---Made up of 2 or more cells….MANY cells

Functions of Organelles 1.Nucleus----Control center of the cell. 2. Nucleolus---stores RNA and makes ribosomes 3. Ribosomes----tiny organelles that make proteins 4. Rough ER--- make proteins

5. Smooth ER----makes lipids 6. Golgi Apparatus--- packages and sends proteins 7. Mitochondria---Power house of the cell 8. Lysosomes---breaks down large molecules in the cell

Three Major Parts of the Cell Cytoplasm Cell Membrane Nucleus

SELECTIVELY or SEMI-PERMEABLE 1. Allows certain substances in Example---Nutrients 2. Allows certain substances out Example----Waste 3. Keeps certain things in Example----Organelles 4. Keeps certain things out Example---Disease and foreign objects

The Cell Theory The cell is the basic unit of life All organisms are made up of cells All cells come from other cells

Differences PLANTANIMAL SquareCircular Cell Wall &Cell Membrane Membrane Only Chloroplasts No Chloroplasts Lg Vacuoles None or Small No Lysosomes Lysosomes

Similarities Plant and Animal Nucleus including Chromosomes and Nuclear Membrane (EUKARYOTES) Cell Membrane Cytoplasm Nucleolus Ribosomes Rough and Smooth ER Golgi Apparatus Mitochondria

DIFFUSION Molecules move from an area of HIGHER concentration of molecules to an area of LOWER concentration of molecules

What we need for diffusion and Why? We need different concentrations in the same are…in other words a concentration gradient… Why? So molecules can move from an are of High conc. (in or out of cell) to an area of Low conc. (in or out of the cell)

EQUILIBRIUM Molecules are at the same concentration throughout the space. Molecules are at the same concentration throughout the space. What the cell is in when Diffusion STOPS… What the cell is in when Diffusion STOPS…

OSMOSIS It is the movement of WATER molecules from an area of LOWER concentration of molecules to an area of HIGHER concentration of molecules

HYPERTONIC SOLUTION Cells Shrinks A solution that has more/higher concentration of solutes (molecules) OUTSIDE the cell than inside the cell

HYPOTONIC SOLUTION Cell gets bigger and bursts A solution that has less/lower concentration of solutes (molecules) OUTSIDE the cell than inside the cell

3. ISOTONIC SOLUTION Cell stays the same size A solution where the concentration of solutes (molecules) are the same on the inside of the cell and outside of the cell

Prokaryotes Very Small No true Nucleus No membrane bond organelles DNA---Plasmids Thought to be 1 st Life forms Performs all Characteristics of life-- SIMILARITY

Eukaryotes Very Small Has a true Nucleus Has membrane bond organelles DNA---Chromosomes Very Complex—lots of organelles Performs all Characteristics of life--- SIMILARITY