AS Biology Topic 2.5

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  • Created by: TobyHill5
  • Created on: 28-04-18 14:53
a lipid/phospholipid with a chain of carbohydrate molecules attached
glycolipid
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Which is not a method for how substances travel through the partially permeable membrane
they pass through special membrane pores
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a protein that spans the whole of the protein bilayer is known as an _________ protein
intrinsic
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steroid hormones travel across membranes via..........
simple diffusion
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CO2 travels across membranes via..........
simple diffusion
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O2 travels across membranes via..........
simple diffusion
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water travels across membranes via..........
simple diffusion
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IONS travels across membranes via..........
facilitated diffusion (channel)
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glucose travels across membranes via..........
facilitated diffusion (carrier)
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amino acids travel across membranes via..........
facilitated diffusion (carrier)
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Which molecule does not travel across membranes via facilitated diffusion involving carrier proteins?
steroid hormones
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Which molecule does not travel across membranes via simple diffusion?
ions
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Water Potential
a measure of the tendency of water molecules to diffuse from one region to another
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In pure water, eukaryotic cells........
take on water
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In pure water, the water potential inside the cell is...........than the surroundings
lower
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In pure water, animal cells become...............
cytolysed
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In pure water, plant cells become.......
turgid
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In a concentrated solution, the water potential is greater ............... the cell
inside
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In a concentrated solution, animal cells become......
crenated
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In a concentrated solution, plant cells become.....
plasmolysed
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The net movement of water down the water potential gradient from a high water potential to a low water potential across a partially permeable membrane
osmosis
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plasmolysis
the plasma membrane is pulled away from the cellulose cell wall
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a solution where the concentration of solute molecule is greater outside the cell than inside
hypertonic
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a solution where the concentration of solute molecule is greater inside the cell than outside
hypotonic
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a solution where the concentration of solutes is the same inside and outside of the cell
isotonic
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hypertonic solution
a solution where the concentration of solute molecule is greater outside the cell than inside
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hypotonic solution
a solution where the concentration of solute molecule is greater inside the cell than outside
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isotonic solution
a solution where the concentration of solutes is the same inside and outside of the cell
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guard cells actively transport potassium ions in, lowering the water potential of the cell so that......
water moves in
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the bulk transport of molecules that are too large to pass through the plasma membrane of the cell, INTO the cell
endocytosis
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the bulk transport of molecules that are too large to pass through the plasma membrane of the cell, OUT OF the cell
exocytosis
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which cell can be crenated and cytolysed?
animal
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which cell can be plasmolysed and turgid?
plant
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energy for active transport is provided by........
hydrolysis of ATP
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proteins with specific regions that combine reversibly with certain solute molecules
carrier
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the fluidity of membranes in colder temperature is determined by.......
proportions of saturated and unsaturated fatty acids
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generally, in colder temperatures the fluidity of membranes (A) because the fatty acids (B)
(A) decreases (B) compress
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raised temperatures can cause holes to appear in the phospholipid membrane as........
membrane-embedded proteins and cytoskeleton threads denature
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Other cards in this set

Card 2

Front

Which is not a method for how substances travel through the partially permeable membrane

Back

they pass through special membrane pores

Card 3

Front

a protein that spans the whole of the protein bilayer is known as an _________ protein

Back

Preview of the front of card 3

Card 4

Front

steroid hormones travel across membranes via..........

Back

Preview of the front of card 4

Card 5

Front

CO2 travels across membranes via..........

Back

Preview of the front of card 5
View more cards

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