Human physiology worksheet with answers

Free printable Human physiology worksheet: 8 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy

Which hormone lowers blood glucose?

  1. AInsulin
  2. BAdrenaline
  3. CGlucagon
  4. DCortisol
2.Easy

Which blood cells carry most of the oxygen in the blood?

  1. APlatelets
  2. BPlasma cells
  3. CRed blood cells
  4. DWhite blood cells
3.Easy

What does bile do to fats in the small intestine?

  1. AAbsorbs them directly into the blood
  2. BBreaks them into amino acids
  3. CConverts them into glucose
  4. DEmulsifies them into small droplets
4.Medium

Which receptors respond mainly to a fall in arterial oxygen levels?

  1. ABaroreceptors in the carotid sinus
  2. BCentral chemoreceptors in the medulla
  3. CStretch receptors in the lungs
  4. DPeripheral chemoreceptors in the carotid and aortic bodies
5.Medium

What does the QRS complex on an ECG represent?

  1. AAtrial repolarisation
  2. BAtrial depolarisation
  3. CVentricular depolarisation
  4. DVentricular repolarisation
6.Medium

Which ABO blood group has both anti-A and anti-B antibodies in the plasma?

  1. AGroup O
  2. BGroup B
  3. CGroup AB
  4. DGroup A
7.Hard

Why does breathing 100% oxygen correct hypoxaemia from a true right-to-left shunt only poorly?

  1. AThe shunted blood never comes into contact with alveolar gas
  2. BPure oxygen damages haemoglobin
  3. CThe extra oxygen is all exhaled as CO₂
  4. DShunted blood is already fully saturated
8.Hard

Why does a deep sea diver risk decompression sickness when surfacing quickly?

  1. ANitrogen dissolved at high pressure forms bubbles as the pressure falls
  2. BOxygen becomes toxic at the surface
  3. CThe lungs collapse when the pressure falls
  4. DCarbon dioxide cannot leave the lungs fast enough

Answer key

  1. 1. A · Insulin
  2. 2. C · Red blood cells
  3. 3. D · Emulsifies them into small droplets
  4. 4. D · Peripheral chemoreceptors in the carotid and aortic bodies
  5. 5. C · Ventricular depolarisation
  6. 6. A · Group O
  7. 7. A · The shunted blood never comes into contact with alveolar gas
  8. 8. A · Nitrogen dissolved at high pressure forms bubbles as the pressure falls

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