diffusion, osmosis, cellular respiration & photosynthesis
TRANSCRIPT
Diffusion, Osmosis, Cellular Respiration & Photosynthesis
Passive TransportParticles move from an area of high
concentration to an area of low concentration.
NO ENERGY REQUIRED TO MAKE THIS WORK
AKA diffusion
DiffusionParticles travel from an area of high
concentration to an area of low concentration.
This process does not require any energy from the cell.
http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html
OsmosisA special kind of diffusion: Diffusion of
water
Diffusion of water through the cell membrane that is so important that it has its own special name.
http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_osmosis_works.html
http://www.indiana.edu/~phys215/lecture/lecnotes/diff.html
More Osmosis…Water moves from an area of high
concentration to an area of low concentration.
See the picture on page 85
Osmosis and the Blood Cell p.85Putting the blood cell
in pure water without salts makes water move INTO the cell by osmosis. The cell will look bloated.
The water “tries to balance itself on both sides of the membrane”.
Questions to AnswerWhat would
happen if we put the cell in super salty solution? Draw what it would look like below.
Active Transport
Active Transport-The cell must use energy to move things into or out of the cell.
This is against the normal direction of diffusion: From an area of LOW concentration to an area of HIGH concentration.
Movement of Large Particles Into Cell
Endocytosis- Cell membrane surrounds a particle and encloses it in a vesicle.
See p. 87
Moves things INTO the cell
http://www.coolschool.ca/lor/BI12/unit4/U04L05/endocytosis_final.html
Movement of Large ParticlesOUT of the Cell.
Exocytosis- Vesicles are formed at the ER or Golgi Complex and are in a “packet” that moves to the cell membrane for release.
Moves things OUT of the cell.
http://www.coolschool.ca/lor/BI12/unit4/U04L05/exocytosis.html
Cellular RespirationNOT the same as respiration or
breathing…but breathing is required so that cellular respiration can occur
Cellular respiration- The process where the cell produces ATP (energy) in the cell from O2 and glucose; carbon dioxide and water are the products.
Cellular RespirationALL ORGANISMS RESPIRE!Know this Equation!!! Reactants Products
6O2 + C6H12O6 6CO2 + 6H2O + ATP oxygen glucose (sugar) carbon dioxide water
energyWhere did they come from? Where are they going?
air food waste waste
Used/StoredAerobic respiration: requires oxygen to be present. Makes 46 ATP’s
FermentationRemember “Feel the Burn”?Fermentation is a process that makes
energy in the absence of O2 which is known as anaerobic respiration.
Some organisms rely solely on fermentation.
Yeast and some bacteria make CO2 and alcohol as a product of the process.
Plant Food (Photosynthesis)Plants have chlorophyll that capture light energy
to change CO2 and H2O into food (glucose).Know this Equation!!! http://wps.prenhall.com/wps/media/objects/486/498596/CDA7_1/CDA7_1b/
CDA7_1b.htm Products Reactants Sun
6CO2 + 6H2O + C6H12O6 + 6O2 carbon dioxide water glucose (sugar) oxygen
Where did they come from? Where are they going? air or respiration (same) respiration respiration
fruit air
Connecting Photosynthesis and Cellular RespirationAnswer the following on the back of your notes page:
Draw the figure on p. 90 on your own piece of paper. Answer the following questions on the back
1. What do you notice about the two equations for photosynthesis & respiration?
2. What happens to the ATP? Where does it go?3. How is ATP used by the cell?4. Explain in 3 sentences or more what is
happening in this figure. 5. How is the cell’s use of CO2 and H2O like people
recycling glass and paper?
Other ProcessesDigestion- Taking in food to break down for
energy
Waste Disposal- Products of cellular respiration and unneeded products.
Growth- Using energy to increase in size.
Reproduction- To generate offspring with all or shared characteristics of the parents.