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40 Cards in this Set

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