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

Most homeostatic control systems in the body work by:

  1. ARandom variation
  2. BFeed-forward only
  3. CNegative feedback
  4. DPositive feedback
2.Easy

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

  1. AAcetylcholine
  2. BDopamine
  3. CSerotonin
  4. DNoradrenaline
3.Easy

Exchange of gases and nutrients between blood and tissues happens mainly across the walls of:

  1. ACapillaries
  2. BVeins
  3. CArteries
  4. DArterioles
4.Medium

Why is the oxygen–haemoglobin dissociation curve S-shaped?

  1. ABinding of one oxygen makes the next bind more easily
  2. BHaemoglobin can bind only one oxygen molecule
  3. COxygen dissolves better in plasma at high partial pressure
  4. DRed cells change size as they take up oxygen
5.Medium

What causes the first heart sound (S1)?

  1. AClosure of the aortic and pulmonary valves
  2. BOpening of the aortic valve
  3. CBlood filling the atria
  4. DClosure of the mitral and tricuspid valves
6.Medium

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

  1. AA band
  2. BI band
  3. CThe whole sarcomere
  4. DH zone
7.Hard

Which spirometry finding is typical of chronic obstructive pulmonary disease (COPD)?

  1. ANormal FEV1 with low FVC
  2. BIncreased peak expiratory flow
  3. CFEV1/FVC ratio below 0.7
  4. DFEV1/FVC ratio above 0.9 with low FVC
8.Hard

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

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

Answer key

  1. 1. C · Negative feedback
  2. 2. A · Acetylcholine
  3. 3. A · Capillaries
  4. 4. A · Binding of one oxygen makes the next bind more easily
  5. 5. D · Closure of the mitral and tricuspid valves
  6. 6. A · A band
  7. 7. C · FEV1/FVC ratio below 0.7
  8. 8. B · It binds 2,3-BPG less strongly

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