LAB EXAM 1 (PHYSIO)

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Last updated 7:52 AM on 8/30/26
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11 Terms

1
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Define pH?

  • it is the concentration of H3O+ in solution

  • The more H3O+ in a solution the more acidic


2
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What is the pH of blood?

7.40

3
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What is the pH of saliva?

7.40

4
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What is the pH of vomit?

2

5
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What is the pH of coffee?

5

6
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Define an acid

  • substance that increases the concentration of Hydrogen ions (H+) in solution

  • Has pH below 7


7
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Define a base

  • substance that decreases the concentration of H+

  • PH of above 7


8
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How is rate of diffusion/osmosis affected by size of molecule?

  • smaller molec size = faster

  • Larger molec size = slower


9
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How is rate of diffusion/osmosis affected by magnitude of the chemical driving force (concentration gradient)?

  • the greater the difference in concentration, the faster the rate of diffusion

  • Molecules move FROM HIGH TO LOW concentration until equilibrium is reached


10
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How is rate of diffusion/osmosis affected by temperature?

  • higher temperature = faster diffusion/osmosis

  • Low temperature = slower diffusion/osmosis

  • Bc higher temp give molecules more kinetic energy, so they move around faster


11
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How does pH affect enzymes?

  • they have specific pH ranges outside of that range the enzyme will denature ( protein will unfold) & be destroyed