Acid-Base Balance in the Human Body Quiz

What is the primary function of acid-base balance in the human body?

• To maintain a narrow pH range for optimal physiological function

• To increase acidity in bodily fluids

• To decrease alkalinity in bodily fluids

• To eliminate all hydrogen ions

What pH range is considered optimal for physiological function in the human body?

• 7.35-7.45

• 6.5-7.0

• 7.5-8.0

• 6.0-6.5

Which system primarily regulates acid-base balance through carbon dioxide levels?

• Respiratory system

• Digestive system

• Circulatory system

• Nervous system

What is the role of the kidneys in maintaining acid-base balance?

• Excreting hydrogen ions and reabsorbing bicarbonate ions

• Producing carbon dioxide

• Increasing acidity

• Decreasing alkalinity

What does a pH below 7 indicate?

• Acidity

• Alkalinity

• Neutrality

• Basicity

What is the primary determinant of pH in the body?

• Hydrogen ions (H+)

• Oxygen ions (O2-)

• Sodium ions (Na+)

• Chloride ions (Cl-)

What is the function of a buffer system in the body?

• To resist significant changes in pH

• To increase acidity

• To decrease alkalinity

• To eliminate all ions

Which is the most important buffer in the blood?

• Bicarbonate buffer system

• Protein buffer system

• Phosphate buffer system

• Sulfate buffer system

What happens when an acid is added to the blood in the bicarbonate buffer system?

• Bicarbonate ions react to neutralize it

• Carbon dioxide is produced

• Hydrogen ions are eliminated

• Oxygen is absorbed

What is the chemical equation for the bicarbonate buffer system?

• CO2 + H2O <=> H2CO3 <=> H+ + HCO3-

• H2O + CO2 <=> H2O2 <=> H+ + O2

• CO2 + O2 <=> H2CO3 <=> H+ + H2O

• H2O + H2 <=> H2CO3 <=> H+ + CO2