In a way a cell is like a miniature version of you In a way a cell is like a miniature version of you. It requires nutrients and, in the process of breaking down the nutrients, the cell produces wastes. So there has to be a way to get nutrients in and wastes out. Cellular Transport

One particular part of the cell plays a huge role in controlling what enters and leaves the cell, so this organelle is in charge of CELLULAR TRANSPORT. Cell Membrane

TRANSPORT FOLDABLE

FLUID MOSAIC MODEL FLUID ___________- because individual phospholipids and proteins can move around freely within the layer, like it’s a liquid. ____________- because its made up of many different parts MOSAIC

Protein Phospholipid Bilayer

FROM A LOT to NOT Molecules move _______“where there’s _______” Animatioin from: http://www.biologycorner.com/resources/diffusion-animated.gif Molecules move _______“where there’s _______” ____“where there’s _______” FROM A LOT to NOT

DIFFUSION across a space Happens anytime there is a __________ in concentration in one place compared to another = ________________________ DIFFERENCE Concentration gradient

DIFFUSION across a SPACE Molecules move automatically _______ the concentration gradient _______ an area of _______ concentration ____ an area of ________ concentration EXAMPLES DOWN from Higher to Lower Blue dye in beaker demo, Someone making popcorn/grilling out Strong perfume, Bad smell in room http://leighhouse.typepad.com/blog/images/kool_aid.jpg http://www.swapmeetdave.com/Humor/Farts.htm

DIFFUSION across a space Diffusion continues until the concentration is ________________ in space = ________________________ equal everywhere Equilibrium http://lhs.lps.org/staff/sputnam/Biology/U3Cell/diffusion_1.png

Molecules need to move across membranes in cells Image modiified from: http://www.accessexcellence.org/AB/GG/importProt.html

Diffusion can happen across a membrane in a cell, too …as long as membrane will let the molecule _________________ pass through

CELL EXAMPLE: DIFFUSION automatically moves oxygen from HIGHER concentration (in lungs) to a LOWER concentration (in blood) CO2 automatically moves from where there is a HIGHER concentration (in blood) to where there is a lower concentration (in lungs) http://www.le.ac.uk/pa/teach/va/anatomy/case2/2_2.html

Fold each flap to the center Fold Here Fold Here

Position your paper this way Cut on the dotted lines ONLY!!!!

FACILITATED DIFFUSION PASSIVE TRANSPORT (no energy) DIFFUSION OSMOSIS FACILITATED DIFFUSION

FACILITATED DIFFUSION PUMPS PASSIVE TRANSPORT (no energy) DIFFUSION OSMOSIS FACILITATED DIFFUSION ACTIVE TRANSPORT (energy needed) PUMPS ENDOCYTOSIS EXOCYTOSIS

DIFFUSION Molecules move From High concentration To Low concentration Ex. Oxygen and Carbon dioxide

DIFFUSION CO2 and O2 HIGH LOW

OSMOSIS When WATER moves from a high to low concentration

OSMOSIS H2O HIGH LOW

FACILITATED DIFFUSION Uses transport proteins to move substances from high to low concentration Ex. Glucose or amino acids

FACILITATED DIFFUSION Glucose HIGH LOW

What if cell needs to move a molecule _________ the CONCENTRATION GRADIENT? _______________ AGAINST (LOWER  HIGHER) Cell example: Want to put MORE glucose into mitochondria when there is already glucose in there Image from: http://www.biologyclass.net/mitochondria.jpg

PUMPS Molecules move from LOW to HIGH concentration. (against the gradient)

PUMPS Ions LOW HIGH ATP

ENDOCYTOSIS Bulk Transport into the cell Pinocytosis (liquids) Phagocytosis (solids)

EXOCYTOSIS Bulk Transport out of the cell