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 hormone lowers blood glucose?

  1. AGlucagon
  2. BAdrenaline
  3. CCortisol
  4. DInsulin
2.Easy

Most homeostatic control systems in the body work by:

  1. ARandom variation
  2. BFeed-forward only
  3. CPositive feedback
  4. DNegative feedback
3.Easy

Which blood vessels have valves that prevent blood flowing backwards?

  1. AVeins
  2. BArteries
  3. CArterioles
  4. DCapillaries
4.Medium

Which hormone is released by the adrenal cortex in response to ACTH?

  1. AThyroxine
  2. BAldosterone, as the main response
  3. CCortisol
  4. DAdrenaline
5.Medium

According to Poiseuille's law, if the radius of an arteriole halves, its resistance to flow:

  1. ADoubles
  2. BIncreases 4-fold
  3. CHalves
  4. DIncreases about 16-fold
6.Medium

Where does the final activation step of vitamin D (1-alpha hydroxylation) take place?

  1. ALiver
  2. BSkin
  3. CSmall intestine
  4. DKidney
7.Hard

Why does left ventricular failure cause pulmonary oedema?

  1. APlasma oncotic pressure in the lungs rises sharply
  2. BThe right ventricle pumps less blood into the lungs
  3. CRaised left atrial pressure increases pulmonary capillary hydrostatic pressure
  4. DThe bronchial arteries become blocked
8.Hard

What is the main reason the ventricles do not contract at the same moment as the atria?

  1. AConduction is delayed at the atrioventricular node
  2. BThe SA node fires twice per beat
  3. CThe ventricles have a longer refractory period only
  4. DThe Purkinje fibres conduct slowly

Answer key

  1. 1. D · Insulin
  2. 2. D · Negative feedback
  3. 3. A · Veins
  4. 4. C · Cortisol
  5. 5. D · Increases about 16-fold
  6. 6. D · Kidney
  7. 7. C · Raised left atrial pressure increases pulmonary capillary hydrostatic pressure
  8. 8. A · Conduction is delayed at the atrioventricular node

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