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, released by the stomach lining, stimulates gastric acid secretion?

  1. AGlucagon
  2. BSecretin
  3. CGastrin
  4. DInsulin
2.Easy

Which hormone, released by the pineal gland in darkness, helps regulate the sleep–wake cycle?

  1. AMelatonin
  2. BAdrenaline
  3. COxytocin
  4. DCortisol
3.Easy

Which hormone does the corpus luteum mainly secrete after ovulation?

  1. AFollicle-stimulating hormone
  2. BProlactin
  3. CLuteinising hormone
  4. DProgesterone
4.Medium

Why does glucose appear in the urine in uncontrolled diabetes mellitus?

  1. AThe collecting duct actively secretes glucose
  2. BInsulin is needed for glucose reabsorption in the tubule
  3. CThe glomerulus stops filtering glucose
  4. DThe filtered load exceeds the tubular transport maximum
5.Medium

During contraction of a skeletal muscle sarcomere, which band stays the same length?

  1. AH zone
  2. BThe whole sarcomere
  3. CA band
  4. DI band
6.Medium

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

  1. AMyelin makes the axon thinner
  2. BMyelin releases neurotransmitter along the axon
  3. CThe impulse jumps between nodes of Ranvier
  4. DMyelin contains more sodium channels
7.Hard

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

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

A patient's arterial blood gas shows pH 7.30, PaCO₂ 7.8 kPa (59 mmHg) and normal bicarbonate. What is the most likely disturbance?

  1. AMetabolic acidosis
  2. BRespiratory alkalosis
  3. CAcute respiratory acidosis
  4. DCompensated metabolic alkalosis

Answer key

  1. 1. C · Gastrin
  2. 2. A · Melatonin
  3. 3. D · Progesterone
  4. 4. D · The filtered load exceeds the tubular transport maximum
  5. 5. C · A band
  6. 6. C · The impulse jumps between nodes of Ranvier
  7. 7. A · CO occupies haemoglobin binding sites, so oxygen content falls
  8. 8. C · Acute respiratory acidosis

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