Clinical biochemistry MCQ 001

1. pH reflects:

1. Free hydrogen ions concentration.

2. Concentration of hydroxyl anions.

3. Hydrogen ions concentration to hydroxyl anions concentration ratio.

4. Hydrogen ions partial pressure.

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2. Which buffer system predominated inside cells?

1. Bicarbonate

2. Acetate

3. Protein

4. Phosphate

5. Haemoglobin

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3. pK of a bicarbonate buffer is:

1.7,3

2.7,4

3.6,1

4.5,9

5.7,8

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4. Through which mechanisms do kidneys take part in regulation of acid-base balance?

1. Maintaining of pCO2

2. Bicarbonate ions reabsorption

3. Hydrogen ions excretion

4. Bicarbonate ions regeneration

5. Nonvolatile acids formation

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5. Which enzyme in renal tubules catalyzes dissociation of carbonic acid?

1. Lactate Dehydrogenase

2. AST

3. ALT

4. Lipase

5. Carbonic Anhydrase

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6. Which anticoagulant is used for determination of parameters of acid base

balance?

1. Oxalate

2. Citrate

3. Heparin Li

4. Heparin-Na

5. EDTA

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7. What are the main organs taking part in regulation of acid-base balance?

1. Lungs

2. Kidneys

3. Liver

4. Spleen

5. Small intestine

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8. Acidosis is characterized by:

1. Increased blood pH

2. Increasing of blood hydroxyl anions concentration

3. Decreased blood pH

4. Increased hydrogen ions concentration in the blood

5. Decreased lactate blood level

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9. Alkalosis is characterized by:

1. Decreased blood pH

2. Decreased blood hydroxyl anions concentration

3. Increased lactate blood level

4. Increased blood pH

5. Decreased hydrogen ions concentration in blood

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10.Respiratory acidosis may develop due to:

1. Prolonged starvation

2. Pyelonephritis

3. Respiratory distress syndrome

4. Hepatitis

5. Hyperventilation

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