WARM-UP:

1) What type of lipids make up the cell membrane?

2) What is one function of the cell membrane?

Agenda

1) Warm-Up 5 min

2) Pop Warm-up check

3) Cell Membrane Video 8 min

4) Intro. to Cell Transport 10 mins

5) Cell transport table 15 mins

6) Grade Quizzes 5 min

7) Osmosis Quick ticket 5 mins

LEARNING GOALS: • Cells are the basic unit of life.• Structures within cells have specific functions.• Cells have different levels of complexity.• Prokaryotic cells have no nucleus.• Eukaryotic cells have a nucleus and membrane bound organelles

HOMEWORK DUE:

10-05-11

phospholipids

Protection & support

Warm-up from10/4/11

http://www.youtube.com/watch?v=Rl5EmUQdkuI&feature=related

Cell membrane video

http://www.youtube.com/watch?v=moPJkCbKjBs

Bi-layer=lipids for a “sandwich structure”

Phospholipids form a thin, flexible sheet.

Proteins “float” on sheet

SEMI PERMABLE

Active vs. Passive Transport

Passive transportPassive: NO ENERGY REQUIREDDiffusionFacilitated DiffusionOsmosis

• Particles (which are constantly moving) move from areas of high concentration to low concentration.

• Diffusion does NOT require energy.

febreeze

Facilitated diffusion

Charged and large particles can be carried through protein channels. Fast and specificMove from high to low

osmosis•Diffusion of water through a selectively permeable membrane.•When the particles are too big to fit through the membrane, water moves from high to low.

Active transport•Sometimes, cells must move materials from low to high – against a concentration gradient.•Active transport requires energy (ATP).

Endo & Exocytosis

•How big bulk materials get transported•Endocytosis – materials taken in by cell membrane pockets

•Exocytosis – materials leaving the cell in membrane pockets

reflectionWhat did you learn about cell membranes?What is the difference between active vs. passive transport?What would happen if there was no transport systems?

DUE TODAY:•Cell membrane transport table•Osmosis quick ticket

DUE NEXT CLASS:

“The whole secret of life is to be interested in one thing profoundly and in a thousand things well.”

Horace Walpole

Lab write-upMaterials:1. Compound microscope2. Clean slides3. Cover slips4. Methylene blue5. Iodine6. Popsicle sticks7. Onion8. “e” piece MICROSCOPE WS

PG. 1070 IN BOOK

Use book to define these wordsOn vocab. chart

1. Cell2. Cell theory 3. nucleus 4. Eukaryote5. Prokaryote

6. Organelle7. Cytoplasm8. Cytoskeleton9. Lipid bilayer10.Cell membrane

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