CELL MEMBRANE• GATEKEEPER

• Made of phospholipids

• Protein gates scattered throughout

• Allows certain particles through

• Selectively Permeable (screen)

PHOSPHOLIPIDS

EQUILIBRIUM• Molecules

spread evenly throughout its environment.

• Keep moving.

DIFFUSION• HIGH to LOW

concentration.

• Transportation of tiny molecules.

ie: H2O, CO2

OSMOSIS• DIFFUSION of

WATER.

• High to Low concentration.

• Through phospholipids.

PASSIVE TRANSPORTATION

• High to low concentration.

• Small particles.• Through protein

gates.• No energy

needed.

PASSIVE

-No

energy needed.

ACTIVE TRANSPORTATION

• Low to High concentration.

• Energy needed.• Small particles.• Through protein

gates.

ACTIVE

-Energy

needed.

• Then theres…

–No energy.

–No hill.

–No brains.

ACTIVE TRANSPORT

• Energy Needed

• Thru gates

• Low to High

REVIEW:

WHICH ONE WHERE?

VESICLES• Made by Golgi

Bodies

to be transported out of the cell.

ENDOCYTOSIS• Entering the cell: IN

• Transportation of large vesicles through the membrane.

• Engulfs like pacman.

EXOCYTOSIS• Leaving the cell: EXIT

• Transportation of large vesicles through the membrane.

• Spits up.

TYPICAL ANIMAL CELL

WHAT WOULD HAPPEN?• If all of our cells were t he

same?• Could we be Eukaryotic?• Could we have Organs or

Organ systems?• What would we be?

SPECIALIZED CELLS

• Different types to do different jobs within Eukaryotic organism.

• Remember: same Cells = Tissue

»Diff tissue = Organ

(Can’t have w/o diff cells)