topic: cell processes aim: explain the two types of cell transport. do now: define the term...
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Topic: Cell Processes
Aim: Explain the two types of cell transport.
Do Now: Define the term “concentration.”
HW: Work on your science fair project.
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The sum of all life processes is known as
a.Regulation
b.Metabolism
c.Transport
d.Excretion
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Metabolism is best described as: (multiple choice)?
a.control of enzyme activity
b.synthesis of macromolecules
c.breakdown of macromolecules
d.A and B
e.A,B, and C
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Transport
•Circulation•Movement of materials into and out of cells
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The chloroplasts move around inside the cell = TRANSPORT
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Passive Transport
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•Materials move from high low concentration
•NO ENERGY NEEDED
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high
low
Weeee!!!
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2 Types of Passive Transport
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1. Diffusion: movement of materials from HIGH to LOW concentration
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HIGH
LOW
DIFFUSION
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•Molecules move until concentration becomes equal on both sides (equilibrium)
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Cell membrane
Inside cell Outside cell
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Cell membrane
Inside cell Outside cell
diffusion
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Cell membrane
Inside cell Outside cell
EQUILIBRIUM
Diffusion through a membrane
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2.Osmosis: diffusion of WATER
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•Movement of WATER from HIGH to LOW concentration
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Topic: Cell Processes
Aim: Explain the two types of cell transport.
Do Now: Define the term “concentration.”
HW: Work on your science fair project.
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• http://zoology.okstate.edu/zoo_lrc/biol1114/tutorials/Flash/Osmosis_Animation.htm
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Inside cell Outside cell
OsmosisCell membrane
High conc. of water molecules.
Low conc. of water molecules.
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Inside cell Outside cell
High conc. of water molecules.
OsmosisCell membrane
OSMOSIS
Low conc. of water molecules.
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OsmosisCell membrane
Inside cell Outside cell
OSMOSIS
EQUILIBRIUM. Equal water concentration on each side.
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HIGH
LOW
+ energy
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Active Transport
http://www.youtube.com/watch?v=1w10R9lv7eQ&feature=related
•Movement of materials from LOW to HIGH concentration
•ENERGY IS NEEDED!
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Let’s summarize:
1. Explain the differences between passive transport and active transport.
2. What is the difference between diffusion and osmosis?
3. When will diffusion stop?
http://www.youtube.com/watch?v=1ZFqOvxXg9M
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Review:
Which process requires cellular energy?
1. diffusion
2. passive transport
3. active transport
4. osmosis
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Sodium ions are pumped from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of
1. diffusion
2. osmosis
3. passive transport
4. active transport
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The movement of materials from lower to higher concentration requiring energy in the form of ATP is called
1. movement
2. diffusion
3. active transport
4. cell division
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The movement of materials from higher to lower concentration is called
1. diffusion
2. active transport
3. pinocytosis
4. 4. phagocytosis
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Damage to which structure will most directly disrupt water balance within a single-celled organism?
1. ribosome
2. cell membrane
3. nucleus
4. chloroplast
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The movement of water from an area of high concentration to an area of low concentration is known as
1. phagocytosis2. osmosis3. active transport4. pinocytosis