Blood Gases and pH in Respiratory Physiology
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Questions and Answers

What do arterial blood gases (ABG) measure?

  • Acidity, oxygen, and carbon dioxide levels (correct)
  • Alkalinity, carbon monoxide, and nitrogen levels
  • Glucose, potassium, and sodium levels
  • Hemoglobin, bicarbonate, and chloride levels
  • Which blood gas test is considered the gold standard in sick patients with respiratory issues?

  • Complete blood count (CBC)
  • ABG testing (correct)
  • Blood urea nitrogen (BUN) test
  • Venous Blood Gas (VBG)
  • In what clinical settings are ABGs commonly performed?

  • Ophthalmology departments
  • Cardiology clinics
  • Orthopedic surgery centers
  • ICU and ER settings (correct)
  • What does the venous blood gas (VBG) accurately determine?

    <p>Carbon dioxide levels</p> Signup and view all the answers

    Why is arterial testing preferred over venous testing in certain patients?

    <p>Because arterial blood reflects oxygenation more accurately</p> Signup and view all the answers

    What are the two important measures of a patient’s clinical status that an ABG can provide?

    <p>Oxygenation and blood acid levels</p> Signup and view all the answers

    What is the main role of the bicarbonate buffer system?

    <p>Regulate the pH of body fluids</p> Signup and view all the answers

    In the Henderson-Hasselbalch Equation, what does 'pK' represent?

    <p>Acid dissociation constant</p> Signup and view all the answers

    How does hypoventilation impact the acid-base balance in the body?

    <p>Increases H+ and lowers pH</p> Signup and view all the answers

    Which condition is associated with respiratory alkalosis?

    <p>Reduced CO2 levels</p> Signup and view all the answers

    What is a common cause of metabolic acidosis?

    <p>Ethanol ingestion</p> Signup and view all the answers

    How do the kidneys contribute to regulating pH in the body directly?

    <p>By excreting or reabsorbing H+ ions</p> Signup and view all the answers

    What does a negative Base Excess (BE) in blood indicate?

    <p>Blood has an excess of acids</p> Signup and view all the answers

    How is oxygen primarily transported in the blood?

    <p>Bound to hemoglobin</p> Signup and view all the answers

    What parameter determines the oxygen saturation (sO2) in the blood?

    <p>Partial pressure of oxygen (pO2)</p> Signup and view all the answers

    What is the normal range for Hemoglobin concentration in males?

    <p>13.5-17.5 g/dL</p> Signup and view all the answers

    What effect do changes in pH have on protein function?

    <p>Alters their tertiary structure</p> Signup and view all the answers

    How is the pH of a solution typically represented?

    <p>[H+]</p> Signup and view all the answers

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