BMS1032 cardio example Q's

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1. the cardiac output:

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

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

3. platelets:

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

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. human blood:

  • contains nucleated RBCs
  • normally has a K conc between 20-25mmol/L
  • is composed of about 40-45% cells, with the remainder plasma
  • normally has a pH range of 7.0-7.1
  • volume is about 10L

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