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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Name: ____________________   Date: ____________

1.Easy

In which direction does oxygen move during gas exchange in the lungs?

  1. AFrom the blood into the bronchi
  2. BFrom the blood into the alveoli
  3. CFrom the alveoli into the blood
  4. DFrom the pleura into the blood
2.Easy

Which hormone lowers blood glucose?

  1. ACortisol
  2. BInsulin
  3. CAdrenaline
  4. DGlucagon
3.Easy

What is the normal resting breathing rate of a healthy adult?

  1. AAbout 4 to 8 breaths per minute
  2. BAbout 12 to 20 breaths per minute
  3. CAbout 25 to 35 breaths per minute
  4. DAbout 40 to 60 breaths per minute
4.Medium

What is the main stimulus for breathing in a healthy person?

  1. AA rise in arterial CO₂
  2. BA fall in blood pH caused by lactate only
  3. CA rise in blood glucose
  4. DA fall in arterial O₂
5.Medium

Why do myelinated axons conduct action potentials faster than unmyelinated ones?

  1. AMyelin releases neurotransmitter along the axon
  2. BMyelin makes the axon thinner
  3. CMyelin contains more sodium channels
  4. DThe impulse jumps between nodes of Ranvier
6.Medium

Besides lowering glucose, insulin moves which ion into cells, an effect used to treat hyperkalaemia?

  1. APotassium
  2. BChloride
  3. CSodium
  4. DCalcium
7.Hard

What is the main reason the ventricles do not contract at the same moment as the atria?

  1. AConduction is delayed at the atrioventricular node
  2. BThe SA node fires twice per beat
  3. CThe ventricles have a longer refractory period only
  4. DThe Purkinje fibres conduct slowly
8.Hard

Hodgkin and Huxley's classic studies of the ionic basis of the action potential used which preparation?

  1. AThe cat spinal cord
  2. BCultured human cortical neurons
  3. CThe frog sciatic nerve–muscle preparation
  4. DThe squid giant axon

Answer key

  1. 1. C · From the alveoli into the blood
  2. 2. B · Insulin
  3. 3. B · About 12 to 20 breaths per minute
  4. 4. A · A rise in arterial CO₂
  5. 5. D · The impulse jumps between nodes of Ranvier
  6. 6. A · Potassium
  7. 7. A · Conduction is delayed at the atrioventricular node
  8. 8. D · The squid giant axon

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