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

What is the liquid part of blood in which the cells are suspended called?

  1. ALymph
  2. BPlasma
  3. CCytoplasm
  4. DInterstitial fluid
2.Easy

Which structure of the inner ear converts sound vibrations into nerve signals?

  1. ATympanic membrane
  2. BAuditory tube
  3. CCochlea
  4. DSemicircular canals
3.Easy

Which neurotransmitter is released at the neuromuscular junction of skeletal muscle?

  1. ADopamine
  2. BNoradrenaline
  3. CSerotonin
  4. DAcetylcholine
4.Medium

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

  1. AInsulin release from the endocrine pancreas
  2. BAcid secretion from the stomach
  3. CContraction of the gallbladder
  4. DBicarbonate secretion from the pancreas
5.Medium

Which protein forms the mesh that stabilises a blood clot?

  1. AAlbumin
  2. BCollagen
  3. CFibrin
  4. DThrombin
6.Medium

What is the normal pH range of arterial blood?

  1. A7.00 to 7.20
  2. B7.50 to 7.65
  3. C6.80 to 7.00
  4. D7.35 to 7.45
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 ventricles have a longer refractory period only
  3. CThe SA node fires twice per beat
  4. DThe Purkinje fibres conduct slowly
8.Hard

Which transporter in the thick ascending limb of the loop of Henle is key to building the medullary concentration gradient?

  1. AThe sodium–glucose cotransporter (SGLT2)
  2. BThe Na⁺–K⁺–2Cl⁻ cotransporter (NKCC2)
  3. CThe epithelial sodium channel (ENaC)
  4. DAquaporin-2 water channels

Answer key

  1. 1. B · Plasma
  2. 2. C · Cochlea
  3. 3. D · Acetylcholine
  4. 4. D · Bicarbonate secretion from the pancreas
  5. 5. C · Fibrin
  6. 6. D · 7.35 to 7.45
  7. 7. A · Conduction is delayed at the atrioventricular node
  8. 8. B · The Na⁺–K⁺–2Cl⁻ cotransporter (NKCC2)

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