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 type of white blood cell is the most numerous in healthy adult blood?

  1. AMonocytes
  2. BLymphocytes
  3. CNeutrophils
  4. DEosinophils
2.Easy

Which hormone is mainly produced by the testes?

  1. AOxytocin
  2. BProlactin
  3. CTestosterone
  4. DProgesterone
3.Easy

What does bile do to fats in the small intestine?

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

What is anatomical dead space?

  1. AThe air that stays in the lungs after full exhalation (residual volume)
  2. BThe volume of the conducting airways where no gas exchange happens
  3. CThe space between the two pleural layers
  4. DAlveoli that have collapsed completely
5.Medium

According to Poiseuille's law, if the radius of an arteriole halves, its resistance to flow:

  1. AHalves
  2. BIncreases 4-fold
  3. CDoubles
  4. DIncreases about 16-fold
6.Medium

Which hormonal event triggers ovulation?

  1. AA rise in progesterone from the corpus luteum
  2. BA fall in oestrogen
  3. CA surge of luteinising hormone (LH)
  4. DA surge of prolactin
7.Hard

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

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

Why can a patient with carbon monoxide poisoning have a normal PaO₂ but severe tissue hypoxia?

  1. ACO stops oxygen from dissolving in plasma
  2. BCO lowers the barometric pressure in the alveoli
  3. CCO blocks diffusion across the alveolar wall
  4. DCO occupies haemoglobin binding sites, so oxygen content falls

Answer key

  1. 1. C · Neutrophils
  2. 2. C · Testosterone
  3. 3. D · Emulsifies them into small droplets
  4. 4. B · The volume of the conducting airways where no gas exchange happens
  5. 5. D · Increases about 16-fold
  6. 6. C · A surge of luteinising hormone (LH)
  7. 7. C · The shunted blood never comes into contact with alveolar gas
  8. 8. D · CO occupies haemoglobin binding sites, so oxygen content falls

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