BMS1032 cardio example Q's

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1. the ECG:

  • contains a p wave of great magnitude than the qrs complex
  • contains a r wave caused by ventricular repolarisation
  • occurs at the same rate as the arterial pulse in a healthy individual
  • is measured with a stethoscope
  • is increased as the strength of the heart beat increases
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2. platelets:

  • store clotting factors
  • aggregate by a process inhibited by asprin
  • are fragmented monocytes
  • are nucleated
  • store fibrin

3. deoxygenated blood:

  • is filtered through the lymphatic system
  • is carried in the pulmonary veins
  • remains about 75% saturated with o2
  • carried less co2 than oxygenated blood
  • contains less haemoglobin than oxygenated blood

4. arteries:

  • dampen the pulsatile flow of blood emerging from the heart
  • contain valves to prevent backflow
  • carry oxygenated blood in both systematic and pulmonary circulation
  • are very distensible compared to veins
  • are sites of gaseous exchange with tissues

5. the cardiac output:

  • is reduced during exercise
  • is decreased if venous return is raised
  • is measured by flow receptors in the aorta
  • is the same from the right ventricle compared to the left
  • is the product of arterial blood pressure multiplied and stroke volume


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