Acid-Base Balance and Enzyme Function

Dr. Orlando explains the bicarbonate buffer system, highlighting its role in maintaining blood pH. The video covers how pH affects enzyme function, the chemical reactions of carbonic acid, and the impact of carbon dioxide levels on blood pH. It also discusses conditions like acidosis and alkalosis, including their causes and treatments.

What is the primary role of a buffer system in the body?

• To regulate body temperature

• To increase blood pressure

• To enhance oxygen transport

• To maintain a stable pH range

What is the average normal blood pH range?

• 7.35 to 7.45

• 8.0 to 8.5

• 6.8 to 7.0

• 7.5 to 8.0

Why is it crucial to maintain a stable pH for enzyme function?

• Enzymes can multiply uncontrollably

• Enzymes can become toxic

• Enzymes can lose their shape and function

• Enzymes can change color with pH changes

What does carbonic acid dissociate into in the bicarbonate buffer system?

• Calcium ions and phosphate

• Sodium ions and chloride

• Hydrogen ions and bicarbonate

• Oxygen and water

What enzyme is involved in the conversion of carbon dioxide and water into carbonic acid?

• Protease

• Amylase

• Lipase

• Carbonic anhydrase

What happens to blood pH when carbon dioxide levels increase?

• Blood pH increases

• Blood pH decreases

• Blood pH becomes neutral

• Blood pH remains unchanged

What condition is characterized by an increase in blood hydrogen ion concentration due to high carbon dioxide levels?

• Metabolic acidosis

• Respiratory alkalosis

• Metabolic alkalosis

• Respiratory acidosis

What is the effect of hyperventilation on carbon dioxide levels in the blood?

• Causes carbon dioxide levels to fluctuate

• Decreases carbon dioxide levels

• Has no effect on carbon dioxide levels

• Increases carbon dioxide levels

What is the term used to describe a condition where blood pH rises due to excessive loss of carbon dioxide?

• Respiratory acidosis

• Metabolic acidosis

• Respiratory alkalosis

• Metabolic alkalosis

How can hyperventilation-induced respiratory alkalosis be treated?

• Taking deep breaths

• Administering oxygen

• Breathing into a paper bag

• Drinking more water