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

Which enzyme in saliva starts the digestion of starch?

  1. ALipase
  2. BPepsin
  3. CTrypsin
  4. DSalivary amylase
2.Easy

What is the typical resting membrane potential of a neuron?

  1. AAbout −70 mV
  2. BAbout +70 mV
  3. CAbout 0 mV
  4. DAbout −10 mV
3.Easy

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

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

Which protein forms the mesh that stabilises a blood clot?

  1. ACollagen
  2. BAlbumin
  3. CFibrin
  4. DThrombin
5.Medium

What is anatomical dead space?

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

The hormone secretin is released when acid enters the duodenum. What is its main effect?

  1. AInsulin release from the endocrine pancreas
  2. BBicarbonate secretion from the pancreas
  3. CContraction of the gallbladder
  4. DAcid secretion from the stomach
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

Why does fetal haemoglobin have a higher affinity for oxygen than adult haemoglobin?

  1. AFetal blood has a higher pH
  2. BIt contains more iron per haem
  3. CIt binds 2,3-BPG less strongly
  4. DIt has five subunits instead of four

Answer key

  1. 1. D · Salivary amylase
  2. 2. A · About −70 mV
  3. 3. A · From the alveoli into the blood
  4. 4. C · Fibrin
  5. 5. D · The volume of the conducting airways where no gas exchange happens
  6. 6. B · Bicarbonate secretion from the pancreas
  7. 7. C · It depolarises cardiac cells, inactivating sodium channels and causing arrhythmias
  8. 8. C · It binds 2,3-BPG less strongly

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