BMS1032 cardio example Q's

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1. arteries:

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

  • is sensed in the carotid sinus
  • may be measured with an electrocardiogram
  • the minimum value recorded in the arteries is termed systolic pressure
  • when reduced is termed hypertension
  • is similar in value in the aorta to pulmonary artery

3. erythropoiesis:

  • is an alternative term for anaemia
  • due to a breakdown of megakaryocytes
  • is regulated by erythropoietin released from the liver
  • is increased by low arterial PO2 (hypoxia)
  • is regulated by erythropoietin released from the spleen

4. plasma proteins:

  • are responsible for the red colour of blood
  • are important carriers of o2 and co2
  • readily cross the capillary wall
  • include immunoglobulins and albumin
  • are synthesised in the spleen

5. the baroreceptor reflex:

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

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