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 neurotransmitter is released at the neuromuscular junction of skeletal muscle?

  1. ADopamine
  2. BAcetylcholine
  3. CNoradrenaline
  4. DSerotonin
2.Easy

Which hormone, made mainly by the kidneys, stimulates red blood cell production?

  1. ARenin
  2. BAldosterone
  3. CErythropoietin
  4. DThrombopoietin
3.Easy

What is the functional unit of the kidney?

  1. AGlomerulus
  2. BNephron
  3. CRenal pyramid
  4. DCollecting duct
4.Medium

Which hormonal event triggers ovulation?

  1. AA rise in progesterone from the corpus luteum
  2. BA surge of prolactin
  3. CA surge of luteinising hormone (LH)
  4. DA fall in oestrogen
5.Medium

In which form is most carbon dioxide carried in the blood?

  1. AAs carbonic acid in platelets
  2. BAs bicarbonate ions in plasma
  3. CBound to the haem iron
  4. DDissolved as CO₂ gas
6.Medium

Which receptor is stimulated when the patellar tendon is tapped in the knee-jerk reflex?

  1. APacinian corpuscle
  2. BMuscle spindle
  3. CGolgi tendon organ
  4. DNociceptor
7.Hard

Hodgkin and Huxley's classic studies of the ionic basis of the action potential used which preparation?

  1. AThe frog sciatic nerve–muscle preparation
  2. BThe cat spinal cord
  3. CCultured human cortical neurons
  4. DThe squid giant axon
8.Hard

Why is severe hyperkalaemia dangerous for the heart?

  1. AIt speeds up the SA node until tachycardia causes fainting
  2. BIt blocks the binding of calcium to troponin
  3. CIt depolarises cardiac cells, inactivating sodium channels and causing arrhythmias
  4. DIt hyperpolarises cardiac cells, so they can never fire

Answer key

  1. 1. B · Acetylcholine
  2. 2. C · Erythropoietin
  3. 3. B · Nephron
  4. 4. C · A surge of luteinising hormone (LH)
  5. 5. B · As bicarbonate ions in plasma
  6. 6. B · Muscle spindle
  7. 7. D · The squid giant axon
  8. 8. C · It depolarises cardiac cells, inactivating sodium channels and causing arrhythmias

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