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.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy

Which blood cells carry most of the oxygen in the blood?

  1. AWhite blood cells
  2. BPlasma cells
  3. CPlatelets
  4. DRed blood cells
2.Easy

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

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

Which enzyme in saliva starts the digestion of starch?

  1. ALipase
  2. BSalivary amylase
  3. CPepsin
  4. DTrypsin
4.Medium

Low plasma albumin, as in severe liver disease, causes oedema mainly because:

  1. ACapillary hydrostatic pressure falls
  2. BPlasma oncotic pressure falls
  3. CLymphatic drainage increases
  4. DThe capillaries become impermeable
5.Medium

Which cells in the stomach secrete hydrochloric acid?

  1. AChief cells
  2. BGoblet cells
  3. CG cells
  4. DParietal cells
6.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 volume of the conducting airways where no gas exchange happens
  4. DThe space between the two pleural layers
7.Hard

Why does ketoacidosis typically develop in untreated type 1 diabetes but rarely in type 2?

  1. AType 2 patients cannot make ketones at all
  2. BKetones are only made in children
  3. CType 1 patients have more glucagon receptors
  4. DEven low insulin levels suppress lipolysis and ketogenesis
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. BAquaporin-2 water channels
  3. CThe epithelial sodium channel (ENaC)
  4. DThe Na⁺–K⁺–2Cl⁻ cotransporter (NKCC2)

Answer key

  1. 1. D · Red blood cells
  2. 2. D · From the alveoli into the blood
  3. 3. B · Salivary amylase
  4. 4. B · Plasma oncotic pressure falls
  5. 5. D · Parietal cells
  6. 6. C · The volume of the conducting airways where no gas exchange happens
  7. 7. D · Even low insulin levels suppress lipolysis and ketogenesis
  8. 8. D · The Na⁺–K⁺–2Cl⁻ cotransporter (NKCC2)

Full step-by-step solutions: practise this topic on examproblems.com.