Competitive Exams: Medical Science MCQs (Practice-Test 33 of 135)

  1. Which of the following hormones causes increased atrial pressure and decreases sodium reabsorption in the kidneys?

    1. Atrial natriuretic peptide

    2. PTH

    3. Aldosterone

    4. Vasopressin

    Answer: a

  2. Angiotensin I is changed by which of the following into Angiotensin II?

    1. ACE

    2. AVT

    3. Pepsin

    4. Adenosine

    Answer: a

  3. Which of the following is not a cause of peripheral edema?

    1. Increased capillary permeability

    2. Reduced levels of plasma proteins

    3. Heart failure

    4. Decreased capillary output

    Answer: d

  4. Which of the following during an electrocardiogram is associated with hypokalemia?

    1. QRS complex

    2. U wave

    3. PR segment

    4. ST segment

    Answer: b

  5. Which of the following is not generally associated with a 2nd degree (Mobitz Type 1) AV block?

    1. Usually asymptomatic

    2. Nonsequential (P wave then QRS complex)

    3. Increased PR segment/interval

    4. 70% Fatal

    Answer: d

  6. An S3 heart sound is often associated with?

    1. CHF

    2. COPD

    3. Atrial fib

    4. Ventricular fib

    Answer: a

  7. Mean arterial pressure is the product of:

    1. TPR x SV

    2. TPR x CO

    3. CO/SV

    4. SV/EDV

    Answer: b

  8. During phase 3 of the myocardial action potential which ion is moving the most?

    1. K +

    2. Ca +

    3. Na +

    4. Ca2 +

    Answer: a

  9. An ejection fraction can be calculated as:

    1. SV/TPR

    2. CO/TPR

    3. SV/EDV

    4. CO/EDV

    Answer: c

  10. Which of the following is not a bradykinin effect?

    1. Elevated capillary permeability

    2. Elevated pain levels

    3. Elevated vasodilation response

    4. Elevated prothrombin secretion

    Answer: d