Movement of Substances Into and Out Of Cells Flashcards

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1
Q

Diffusion

A

The net movement of molecules from an area of high concentration to an area of low concentration

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2
Q

Active transport

A

The movement of molecules against the concentration gradient using energy from respiration

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3
Q

Osmosis

A

The net movement of water molecules from an area of high water potential to an area of low water potential

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4
Q

Diffusion happens more quickly

A

Greater concentration gradient

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5
Q

Larger surface area in proportion to volume

A

Increase the rate of diffusion

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6
Q

The rate of diffusion is decreased

A

Greater distance over which diffusion has to take place

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7
Q

Higher temperatures

A

The rate of diffusion increases because the particles have more kinetic energy

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8
Q

Describe an experiment to measure the effect of a factor upon rate of diffusion

A
  1. Cut a cube of Agar jelly dyed with potassium permanganate from a petri dish
  2. Drop the cube into a beaker of dilute hydrochloride acid
  3. Note the time taken for the cube to turn colourless
  4. Repeat and average
  5. Change the independent variable and repeat
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