BMS1032 cardio example Q's

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1. the ECG:

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

  • plasma of group O contains no anti A or anti B antibodies
  • a person of blood group O is a universal donor
  • A and B surface antigens are found on monocytes
  • rhesus factor antigen is only found on group O blood
  • a person of group A contains anti A antibodies

3. the cardiac output:

  • 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
  • is reduced during exercise
  • is decreased if venous return is raised

4. the baroreceptor reflex:

  • is responsible for the regulation of heart rate
  • is mediated by receptors in the heart
  • is an example of a negative feedback process
  • increases heart rate in response to an increase of bp
  • utilises chemoreceptors located in the brain

5. the tricuspid valve:

  • guards the entrance to the aorta from the left ventricle
  • prevents backflow of blood when standing up
  • is open during diastole
  • guards the entrance to the left ventricle from the left atrium
  • is composed of vascular smooth muscle

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