STARTER: 10/22/2013answer 3-5 complete sentences.

Define the following in your own words using complete sentences. Use the words in parenthesis as part of the sentence.

Protein (polymer)

Glucose (monomer)

Fatty acids (monomer)

Nucleic acid (polymer)

Table of ContentsDate Lecture/ Activity/ Lab Page Grade

9/9 Practice: Food Webs & Food Chains

9/10 Practice: Ecological Pyramids

9/16 Practice: Carbon Cycle Notes

9/16 Application: Carbon Cycle Activity

9/17 Application: Nitrogen Cycle Activity

9/23 Practice: Biomolecule notes10/1 Practice: Enzyme Notes10/8 Practice: Basic Cell Structure: Prokaryote vs. Eukaryote

10/21 Diffusion Intro and Notes

Diffusion & OsmosisDiffusion & Osmosis

DiffusionDiffusionThe The movement of molecules from an movement of molecules from an

area ofarea of high concentratedhigh concentrated to a area to a area of low concentrationof low concentration

No energy requiredNo energy required

OsmosisOsmosisThe diffusion of The diffusion of waterwater across across

a selectively permeable a selectively permeable membrane – membrane – no energy no energy requiredrequired– Movement of water molecules Movement of water molecules

from high concentration to low from high concentration to low concentrationconcentration. .

Selectively Permeable MembraneSelectively Permeable Membrane

A membrane that allows only certain A membrane that allows only certain materials to cross it materials to cross it

Materials pass through Materials pass through porespores in the in the membranemembrane

Our cell membranes are selectively Our cell membranes are selectively permeablepermeable

OsmosisOsmosis

http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_osmosis_works.html

Facilitated DiffusionFacilitated Diffusion

Movement of specific molecules Movement of specific molecules across cell membranes through across cell membranes through protein channels – protein channels – no energy no energy requiredrequired

Why are osmosis & Why are osmosis & diffusion important?diffusion important?

Why are osmosis & diffusion Why are osmosis & diffusion important?important?

All living things have certain All living things have certain requirements they must satisfy in requirements they must satisfy in order to remain alive. These include order to remain alive. These include exchanging gases (usually COexchanging gases (usually CO22 and and OO22), taking in water, minerals, and ), taking in water, minerals, and food, and eliminating wastes. food, and eliminating wastes. These These tasks ultimately occur at the cellular tasks ultimately occur at the cellular level, and require that molecules level, and require that molecules move through the membrane that move through the membrane that surrounds the cell. surrounds the cell.

Why are osmosis & diffusion Why are osmosis & diffusion important?important?

The cell membrane is a complex The cell membrane is a complex structure that is responsible for structure that is responsible for separating the contents of the cell separating the contents of the cell from its surroundings, for controlling from its surroundings, for controlling the movement of materials into and the movement of materials into and out of the cell, and for interacting out of the cell, and for interacting with the environment surrounding with the environment surrounding the cell. the cell.

EndocytosisEndocytosis Process by which a cell takes Process by which a cell takes

material into the cell by “infolding” of material into the cell by “infolding” of the cell membranethe cell membrane

EndoEndo

meansmeans

InIn Requires Requires

energyenergy

ExocytosisExocytosis Process by which a cell releases Process by which a cell releases

large amounts of materiallarge amounts of material Exo means exitExo means exit Requires energyRequires energy

Active TransportActive Transport Movement of materials across a Movement of materials across a

membrane membrane from low to high from low to high concentration concentration using energyusing energy

Aka ion-proteinAka ion-protein

PumpPump Requires energy Requires energy

HomeostasisHomeostasisMaintenance of a relatively Maintenance of a relatively

stable internal environmentstable internal environment– [homeo]=same; [stasis]=stay[homeo]=same; [stasis]=stay– The internal environment of a cell The internal environment of a cell

is everything on the inside of the is everything on the inside of the plasma membraneplasma membrane

Maintaining HomeostasisMaintaining Homeostasis

Essential for the survival of each cellEssential for the survival of each cell Every cell contributes to the goal of Every cell contributes to the goal of

maintaining homeostasismaintaining homeostasis Every organ system(remember there Every organ system(remember there

are 11) contributes to the are 11) contributes to the maintenance of homeostasis in your maintenance of homeostasis in your body body

TonicityTonicity

IsotonicIsotonicwhen the concentration of when the concentration of

solutes is the same on each side solutes is the same on each side of the cell membraneof the cell membrane– homeostasishomeostasis

HypertonicHypertonicgreater concentration of solutes greater concentration of solutes

outside of a celloutside of a cell– This causes water to leave the cell This causes water to leave the cell

(cell shrinks)(cell shrinks)

HypotonicHypotonic lesser concentration of solutes lesser concentration of solutes

outside the celloutside the cell– This causes water to flood the cell (cell This causes water to flood the cell (cell

swells)swells)

Vocabulary Flash Cards Grading Vocabulary Flash Cards Grading RubricRubric

20 points20 points: The word (spelled correctly): The word (spelled correctly)

50 points50 points: A simplified definition: A simplified definition

30 points30 points: A picture associated with : A picture associated with the word to help you remember what it the word to help you remember what it meansmeans

Cellular Homeostasis Cellular Homeostasis VocabularyVocabulary

DiffusionDiffusion OsmosisOsmosis Facilitated diffusionFacilitated diffusion Active transportActive transport HypertonicHypertonic

HypotonicHypotonic IsotonicIsotonic EndocytosisEndocytosis ExocytosisExocytosis Semi-permeable Semi-permeable

membranemembrane

ExampleExample

Lipid bilayerLipid bilayer The two layers of The two layers of phospholipids that phospholipids that make up the cell make up the cell membranemembrane

Exit: 10/22Exit: 10/22

Use a Venn Diagram or a T-chart to Use a Venn Diagram or a T-chart to list the similarities and differences list the similarities and differences between between osmosisosmosis and and diffusiondiffusion