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Unit 2
Structure and Functions of
Cell Membrane
Fluid-Mosaic Model
Terms
• Acid
– Any substance that can yield a hydrogen ion (H+) or hydronium
ion when dissolved in water
– Release of proton or H+
• Base
– Substance that can yield hydroxyl ions (OH-)
– Accept protons or H+
• pH
– Negative log of the hydrogen ion concentration
– Represents the hydrogen concentration
Terms
• Buffer
– Combination of a weak acid and /or a weak base and its salt
– What does it do?
• Resists changes in pH
– Effectiveness depends on
• pH of environment in which it is placed
• Acidosis
– pH less than 7.35
• Alkalosis
– pH greater than 7.45
• Note: Normal pH of blood is 7.35-7.45
Compensatory Mechanism

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Unit 2.ppt

  • 1. Unit 2 Structure and Functions of Cell Membrane
  • 2.
  • 3.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16.
  • 17.
  • 18.
  • 19.
  • 20.
  • 21.
  • 22.
  • 23.
  • 24.
  • 25. Terms • Acid – Any substance that can yield a hydrogen ion (H+) or hydronium ion when dissolved in water – Release of proton or H+ • Base – Substance that can yield hydroxyl ions (OH-) – Accept protons or H+ • pH – Negative log of the hydrogen ion concentration – Represents the hydrogen concentration
  • 26.
  • 27. Terms • Buffer – Combination of a weak acid and /or a weak base and its salt – What does it do? • Resists changes in pH – Effectiveness depends on • pH of environment in which it is placed • Acidosis – pH less than 7.35 • Alkalosis – pH greater than 7.45 • Note: Normal pH of blood is 7.35-7.45
  • 28.
  • 29.
  • 30.
  • 31.