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. ASalivary amylase
  2. BTrypsin
  3. CLipase
  4. DPepsin
2.Easy

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

  1. ASerotonin
  2. BDopamine
  3. CAcetylcholine
  4. DNoradrenaline
3.Easy

Most homeostatic control systems in the body work by:

  1. ARandom variation
  2. BPositive feedback
  3. CFeed-forward only
  4. DNegative feedback
4.Medium

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

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

Which ABO blood group has both anti-A and anti-B antibodies in the plasma?

  1. AGroup O
  2. BGroup A
  3. CGroup AB
  4. DGroup B
6.Medium

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

  1. AThe whole sarcomere
  2. BI band
  3. CH zone
  4. DA band
7.Hard

After several days of persistent vomiting of stomach contents, which acid–base disturbance is most likely?

  1. ARespiratory acidosis
  2. BRespiratory alkalosis
  3. CMetabolic acidosis
  4. DMetabolic alkalosis
8.Hard

In primary adrenal insufficiency (Addison's disease), which combination is expected?

  1. AHigh sodium, high potassium and high ACTH
  2. BLow sodium, high potassium and high ACTH
  3. CLow sodium, low potassium and low ACTH
  4. DHigh sodium, low potassium and low ACTH

Answer key

  1. 1. A · Salivary amylase
  2. 2. C · Acetylcholine
  3. 3. D · Negative feedback
  4. 4. D · Binding of one oxygen makes the next bind more easily
  5. 5. A · Group O
  6. 6. D · A band
  7. 7. D · Metabolic alkalosis
  8. 8. B · Low sodium, high potassium and high ACTH

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