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40 Cards in this Set
- Front
- Back
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What method of transport into cell requires energy from ATP? |
Active transport and
facilitated diffusion. |
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What method of transport into cell requires protein carrier molecules?
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Active transport and
facilitated diffusion. |
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What transport into cell involve movement from high to low concentration?
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Facilitated diffusion and
osmosis. |
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What is the property of the cell surface membrane which allows osmosis to take place? |
Semi-permeable.
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Cell eating -
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Phagocytosis.
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Cell drinking -
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Pinocytosis.
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Water diffuses from a ...... to a ...... one.
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weaker
stronger |
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Hypertonic - |
Stronger.
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Hypotonic -
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Weaker.
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OP |
Osmotic pressure.
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What is osmotic pressure (OP)?
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The pressure that develops as a result of osmosis occuring.
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Iso -
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the same.
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Isotonic solutions have the ....... OP.
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same
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Hypertonic solutions have a ...... OP than another.
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greater
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Hypotonic solutions have a ..... OP than another.
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lower
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An increase in temperature ..... the diffusion rate.
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increases
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A decrease in temperature ....... down the diffusion rate.
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slows
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Does diffusion require energy?
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No
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Small molecules diffuse ...... than larger ones.
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faster
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What is the diffusion gradient(concentration gradient)?
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The greater the difference in concentration between 2 regions the faster the diffusion.
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Facilitated diffusion is the same as diffusion but .....
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quicker.
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Facilitated diffusion depends on the ...... ......
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concentration gradient.
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Is energy needed for facilitated diffusion?
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No
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What is water potential?
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The measure of the tendency of water to leave a solution.
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Pure water has a water potential of?
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zero
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The stronger a solution the more ........ the ..... ..... becomes.
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negative
water potential |
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Water moves from a .... water potential to a ......
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high
lower (more negative). |
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Active transport involves.
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expenditure of energy to move molecules/ions across the cell membrane.
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In active transport substances can be moved ..... a concentration gradient.
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against
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Cells involved in active transport have a large number of .......
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mitochondria
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Where does the energy come from in active transport?
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mitochondria
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Crenates
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shivels as in cell loosing water by osmosis.
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Lyse
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haemolysis or burst leaving a ghost cell.
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In active transport substances move from ..... concentration to ....... concentration.
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low
high |
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What inhibits active transport?
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posions such as cyanide inhibit energy release.
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Particles too big to pass through membrane may be taken into a cell by ...... |
phagocytosis (cell eating)
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What are the 3 methods of transport into cells?
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Active transport
facilitated diffusion and osmosis. |
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Solute -
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dissolved substances.
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Water will move from where there is ..... to .....
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more
less. |
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What are ions?
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charged particles.
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