bvcbcxcxfbdfhgdhfdbfdh

1. Unit 2
Structure and Functions of
Cell Membrane

4. Fluid-Mosaic Model

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

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

32. Compensatory Mechanism