Water and Inorganic Ions Flashcards

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1
Q

How is water used in organisms?

A
  • metabolite
  • solvent
  • maintain temperature
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2
Q

Why is a high specific heat capacity a useful feature of water?

A

lots of energy required to change temperature
acts as a buffer to temperature change

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3
Q

Why is cohesion a useful feature of water molecules?

A

allows effective transport in the xylem
supports columns of water

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4
Q

Why is the polarity of water a useful feature?

A

it can act as a solvent, allowing gases to readily diffuse and be excreted

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5
Q

What reactions is water involved in?

A

condensation and hydrolysis

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6
Q

Why is a high latent heat a useful property of water?

A

requires heat energy to evaporate, so has cooling affect on organisms

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7
Q

Why are H+ ions important?

A

determine pH (digestion), they also are involved in mass transport of sucrose in plants, chemiosmosis in photosynthesis

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8
Q

Why are Fe2+ ions important?

A

important component in haemoglobin, which carries oxygen

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9
Q

Why are Na+ ions important?

A

involved in the co-transport of glucose and amino acids
nerve impulses

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10
Q

Why are PO4^3- ions important?

A

make up ATP, DNA and RNA

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11
Q

Why is the action of water as a solvent important?

A

as ATP/enzyme reactions happen in solution

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