Explain concentration gradient and diffusion with a picture or diagram..

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Bellwork

• Staple Current Events
• Rubric
• Written Analysis
• Article
• MLA Cite Reference

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Explain concentration gradient and diffusion with
a picture or diagram..
1.

• Also write a real-life example of diffusion

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Concentration Gradient
Concentration gradient is when the substance
stays in one area more, than in another area.
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• Diffusion

Diffusion
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Diffusion

• An everyday example of diffusion is Kool-Aid
  mixing with water. The high concentration of the
  Kool-Aid powder moves to the areas of the powder
  where it is in low concentration.

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2.

• Discuss the similarities and differences between
  diffusion and osmosis.

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Question 2Discuss the similarities and
differences between diffusion and osmosis.

• Osmosis vs. Diffusion

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Diffusion!

• Diffusion is the movement of particles or
  substances from an area that is crowded and
  concentrated to an area that is not in order to
  reach an equilibrium.
• Different from.

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Osmosis!

• .which is when water molecules go through a
  semi-permeable membrane (plasma membrane) from an
  area of higher concentration to an area of lower
  concentration.

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Different! But how?

• Diffusion is the movement of any substance from a
  higher to lower concentration while osmosis is
  the movement of water
• Diffusion does not always move through a
  semi-permeable membrane (example food coloring
  dropped into water) while osmosis does (example
  water traveling through the plasma membrane)

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Similar too!

• Both move particles from high to low concentration

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3.

• What would happen to a cell if placed in the
  following solutions (describe and illustrate).
• Isotonic solution
•  
• Hypotonic solution
• Hypertonic solution

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4.

• Use pictures to illustrate and arrows to show the
  direction of osmosis for each of the conditions
  below. Assume the membrane is not permeable to
  sucrose.
• Intravenous solutions must be prepared so that
  they are isotonic to red blood cells. A 0.9
  salt solution is isotonic to red blood cells.
• Explain what will happen to a red blood cell
  placed in a solution of 99.3 water and 0.7
  salt.
• Explain what would happen to a red blood cell
  placed in a solution of 90 water and 10 salt.

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Osmosis/Tonicity

• Vince, Ally, Katelin, and Christian.

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Hypertonic

• The water in the red blood cell leaves the cell.
• This happens because the concentration of the
  solution is higher than the concentration in the
  cell.

The blood cells are shriveling up because the
water is leaving the cell.
The cells are fine because the water stays in the
cell.
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Hypotonic

• The water stays in the cell because the
  concentration of the solution is higher inside
  the actual cell.
• The cell will possibly burst because the water is
  flowing in the cell.
• Water always moves from low to high.

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5.

• Draw and describe a plant cell in a hypotonic
  solution. How will a plant cell respond
  differently than an animal cell? Why?

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5. Hypotonic Solution

• More water is entering the cell
• than leaving the cell.
•  
• Causes the cell to expand.
•  
• Two different things will happen
• depending on the type of cell.

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Plant Cell

• Water will fill the cell.
• It will NOT explode.
• The cell wall prevents the
• plant cell from rupturing.

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Animal Cell

• Water will fill the cell.
• It will explode if it gets too full.
• Animal cells do not have the
• structure that the cell wall provides.

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6.

• For the most part, plants and animal live in
  either a salt water environment or a fresh water
  environment, not both. Explain this using the
  principles of diffusion.

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Fresh and Salt Water

• Conner Hayes, Mariana Corpus Isaac Kerny

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• Certain fish and plants can live in the salt
  water because they can tolerate large quantities
  of salt. Other fish cant live in the salt water
  because the have low salt tolerance.
• Fish that can live in both environments come from
  places like the mouth of a delta. The fresh water
  diffuses across the salt water and the fish
  slowly become accustomed too a dual- water
  environment.

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7.

• What is required for active transport to occur?

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7 What is required for active transport to
occur? Ben Baker, Darion Denniston, and Kiersten
Henderson(

• In order for active transport to occur, you
  first must have energy (ATP) from the cell.

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In active transport, a substance in the transport
must bind with a carrier protein this carrier
protein usually matches the shape of the
molecule, due to chemical energy changing the
shape.
The carrier protein releases the molecule on the
other side of the membrane. Then the protein goes
back to it regular shape, after being released
from the carrier cell. This is necessary to for
homeostasis.
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8.

• What if there is a large food particle or
  organism that a predatory cell like an amoeba
  wants to eat? It must use a process called
  exocytosis. Draw a diagram showing how this
  process works. Give two examples of substances
  that a cell might export this way.

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http//highered.mcgraw-hill.com/sites/007337797x/s
tudent_view0/chapter5/animation_quiz_-_endocytosis
_and_exocytosis.html
Click for diagram
Cells sometimes export proteins that are to big
for active transport that are to be used in the
plasma membrane. Cells will also export extra
cellular fluids for other cells to use.
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Cell Transport

• Active
• Passive
• Diffusion
• Facilitated Diffusion
• Osmosis
• Isotonic
• Hypertonic
• Hypotonic
• Endocytosis

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Section 8.1 Summary pages 195 - 200
Osmosis Diffusion of Water

• The diffusion of water across a selectively
  permeable membrane is called osmosis.

• Real- World Applications
• Plant Cells Cellular Respiration
• Preserving Fruit and Meat
• Medicine
• IV
• Storage of Red Blood Cells

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When comparing two solutions to one another, we
define
Hypotonic solution has a lower solute
concentration
Hypertonic solution has a higher solute
concentrations
Isotonic solutions with equal concentration.
Osmosis Simulation
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