112DT Semester 1 questions

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1. What does the systolic value represent?

  • When the ventricles contract
  • When the ventricles relax
  • When the atria contracts
  • When the atria relaxes
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2. What is unusual about the pulmonary vein?

  • It is the only vein that carries oxygenated blood
  • It carries de-oxygenated blood to the heart
  • It carries blood away from the heart
  • It is smaller that all the other veins in the body

3. In an ECG what is happening in the cardiac cycle and the Q wave?

  • The electrical signal spreads to the perkinje fibres
  • The electrical signal spreads to the bundle branches
  • The electrical signal enters the Bundle of His
  • The ventricle depolarises

4. Metabolic acidosis is caused by:

  • Imparied H+ excretion at the kidneys, CHO3- gain and production of a large number of fixed or organic acids
  • Imparied H+ excretion at the kidneys, CHO3- loss and production of a large number of fixed or organic acids
  • Increased H+ excretion at the kidneys, severe CHO3- loss, and production of a large number of fixed or organic acids
  • Increased H+ excretion at the kidneys, severe CHO3- gain, and production of a large number of fixed or organic acids

5. Which of the following is not an example of negative feedback?

  • If water conc. of blood falls, ADH production is increased so less water is lost in urine
  • When nerve signals are transmitted, presence of sodium ions cause the membrane potential to be changed. The change in potential allows more sodium ions through
  • If external body temp. decreases , heat is produced by shivering, hairs on skin stand up to insulate, and arterioles constrict to avoid heat loss.
  • When BP increases, receptors send a message to the brain. The brain then causes the heart rate to decreased and the blood vessles to constrict. BP falls as a result.

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