brought to you by mr. _______. cell transport zthe movement of substances across the ____...
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Brought to you byMr. _______
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Cell Transport
The movement of substances across the ____ ___________.
There are 2 general categories of cell transport: ________- requires no energy. ________- requires energy.
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Terms to Know
Concentration gradient- A __________ in the concentration of a substance across a space.
Example: 1 room has many bouncing balls in it. The room next door has none.
Equilibrium- A condition in which the concentration of a substance is _________ throughout a space.
Example: Open the door between the rooms, and the balls will enter the second room.
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3 Modes of Passive Transport:
1. _______ _________2. _________3. Facilitated Diffusion
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Simple Diffusion
The movement of a substance from an area of higher concentration ___ an area of lower concentration.
If diffusion is allowed to continue, _____________ eventually results.
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Osmosis
The diffusion of water through a ____________ ____________ membrane.
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3 Types of Solutions
1. ____________2. Hypotonic3. Isotonic
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Hypertonic
Water moves ____ of the cell.
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Hypotonic
Water moves ____ the cell.
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Isotonic
Water moves in and out of the cell __________.
The net result is ___ _________.
This is called __________ _____________.
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Facilitated Diffusion
A carrier protein binds to a specific substance on one side of the cell membrane, _________ it across, and releases it on the other side.
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Active Transport
The transport of a substance across the cell membrane ________ its concentration gradient.
This means the cell is moving substances from an area of low concentration to an area of __________ concentration.
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Modes of Active Transport
1. Sodium-Potassium Pump
2. Endocytosis ___________ ___________
3. Exocytosis
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Sodium-Potassium Pump
This is a special carrier protein.
It carries __ sodium ions (Na+) out of a cell for every __ potassium ions (K+) it brings into a cell.
Both Na+ and K+ are going against their concentration gradient.
Occurs only in ____________ cells.
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Endocytosis
The movement of a substance ____ a cell by a vesicle.
A vesicle is a small ____ formed by a cell membrane.
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Phagocytosis
Taking in ________.“Phago” means
“___ _____”.
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Pinocytosis
Taking in _______.“Pino” means “__
________”.
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Exocytosis
The movement of a substance by a vesicle to the ________ of a cell.