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

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

  1. AInterstitial fluid
  2. BCytoplasm
  3. CPlasma
  4. DLymph
2.Easy

Which organ makes most plasma proteins, such as albumin?

  1. ALiver
  2. BKidney
  3. CBone marrow
  4. DSpleen
3.Easy

Which part of the nervous system is responsible for the "fight or flight" response?

  1. ASympathetic nervous system
  2. BParasympathetic nervous system
  3. CSomatic nervous system
  4. DEnteric nervous system
4.Medium

Which ion enters the cell to cause the depolarisation phase of a typical neuronal action potential?

  1. APotassium (K⁺)
  2. BChloride (Cl⁻)
  3. CCalcium (Ca²⁺)
  4. DSodium (Na⁺)
5.Medium

Which receptors respond mainly to a fall in arterial oxygen levels?

  1. AStretch receptors in the lungs
  2. BPeripheral chemoreceptors in the carotid and aortic bodies
  3. CBaroreceptors in the carotid sinus
  4. DCentral chemoreceptors in the medulla
6.Medium

Since action potentials are all-or-none, how does a neuron signal a stronger stimulus?

  1. ABy changing the neurotransmitter it releases
  2. BBy firing action potentials more often
  3. CBy making each action potential longer
  4. DBy making each action potential larger
7.Hard

In a patient with primary hypothyroidism, you would expect:

  1. AHigh TSH and low free T4
  2. BHigh TSH and high free T4
  3. CLow TSH and low free T4
  4. DLow TSH and high free T4
8.Hard

Which adaptation develops over days to weeks at high altitude?

  1. AHigher erythropoietin levels and more red blood cells
  2. BIncreased renal bicarbonate retention
  3. CA fall in haematocrit
  4. DLower ventilation to save oxygen

Answer key

  1. 1. C · Plasma
  2. 2. A · Liver
  3. 3. A · Sympathetic nervous system
  4. 4. D · Sodium (Na⁺)
  5. 5. B · Peripheral chemoreceptors in the carotid and aortic bodies
  6. 6. B · By firing action potentials more often
  7. 7. A · High TSH and low free T4
  8. 8. A · Higher erythropoietin levels and more red blood cells

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