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 part of the nervous system is responsible for the "fight or flight" response?

  1. ASomatic nervous system
  2. BSympathetic nervous system
  3. CEnteric nervous system
  4. DParasympathetic nervous system
2.Easy

What is the normal resting heart rate range for a healthy adult?

  1. A60 to 100 beats per minute
  2. B40 to 60 beats per minute
  3. C100 to 140 beats per minute
  4. D20 to 40 beats per minute
3.Easy

Which pituitary hormone stimulates the thyroid gland?

  1. AGrowth hormone (GH)
  2. BLuteinising hormone (LH)
  3. CAdrenocorticotropic hormone (ACTH)
  4. DThyroid-stimulating hormone (TSH)
4.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
5.Medium

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

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

What is the main function of pulmonary surfactant?

  1. ATo kill bacteria in the airways
  2. BTo trap dust in the bronchi
  3. CTo carry oxygen across the alveolar wall
  4. DTo reduce surface tension in the alveoli
7.Hard

Why is severe hyperkalaemia dangerous for the heart?

  1. AIt blocks the binding of calcium to troponin
  2. BIt hyperpolarises cardiac cells, so they can never fire
  3. CIt depolarises cardiac cells, inactivating sodium channels and causing arrhythmias
  4. DIt speeds up the SA node until tachycardia causes fainting
8.Hard

According to the length–tension relationship, why does a skeletal muscle fibre produce less force when overstretched?

  1. AActin and myosin overlap less, so fewer cross-bridges form
  2. BCalcium is no longer released from the sarcoplasmic reticulum when stretched
  3. CThe neuromuscular junction stops working
  4. DThe muscle runs out of ATP when stretched

Answer key

  1. 1. B · Sympathetic nervous system
  2. 2. A · 60 to 100 beats per minute
  3. 3. D · Thyroid-stimulating hormone (TSH)
  4. 4. D · The impulse jumps between nodes of Ranvier
  5. 5. B · The filtered load exceeds the tubular transport maximum
  6. 6. D · To reduce surface tension in the alveoli
  7. 7. C · It depolarises cardiac cells, inactivating sodium channels and causing arrhythmias
  8. 8. A · Actin and myosin overlap less, so fewer cross-bridges form

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