Acid base balance

Which of the following pH is within the normal range for blood?

• 7.31

• 7.37

• 7.48

• 7.50

Metabolic processes are sensitive to pH levels because:

• Enzymes require a specific pH to function optimally.

• pH levels do not affect them.

• Enzyme cannot work in acidic conditions.

• They are not related to pH levels.

Where in the human body is the most acidic environment found?

• Large intestine

• Small intestine

• Saliva

• Stomach

Ability of small molecules to pass across the cell membrane is NOT affected by pH.

• TRUE

• FALSE

Which of the following is the most important buffer system in the blood?

• Phosphate buffer

• Protein buffer

• Bicarbonate buffer

• Respiratory buffer

Which of the following is the most important buffer system inside cells?

• Phosphate buffer

• Protein buffer

• Bicarbonate buffer

• Respiratory buffer

In case of acidosis, hyperventilation occurs to increase CO₂ exhalation.

• TRUE

• FALSE

If blood is alkaline, kidneys reabsorb more HCO₃⁻ into the blood.

• TRUE

• FALSE

pH homeostasis is maintained at three levels. Which one is the slowest?

• Biochemical buffer system

• Respiratory compensation

• Metabolic compensation

• Bicarbonate buffer system

What is the primary role of the kidneys in maintaining blood pH?

• Increasing blood pressure

• Producing more red blood cells

• Reabsorbing bicarbonate

• Excreting excess CO₂