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 vitamin is needed by the liver to make several clotting factors?

  1. AVitamin C
  2. BVitamin B12
  3. CVitamin K
  4. DVitamin D
2.Easy

Which organ filters the blood to produce urine?

  1. ABladder
  2. BLiver
  3. CSpleen
  4. DKidney
3.Easy

Which enzyme begins protein digestion in the stomach?

  1. ALipase
  2. BAmylase
  3. CPepsin
  4. DLactase
4.Medium

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

  1. ABaroreceptors in the carotid sinus
  2. BStretch receptors in the lungs
  3. CPeripheral chemoreceptors in the carotid and aortic bodies
  4. DCentral chemoreceptors in the medulla
5.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 larger
  4. DBy making each action potential longer
6.Medium

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

  1. AHalves
  2. BIncreases 4-fold
  3. CDoubles
  4. DIncreases about 16-fold
7.Hard

In Graves' disease, what thyroid function results are expected and why?

  1. ALow T4 and high TSH, because antibodies destroy the gland
  2. BHigh T4 and high TSH, because the anterior pituitary gland is overactive
  3. CHigh T4 and low TSH, because antibodies stimulate the TSH receptor
  4. DLow T4 and low TSH, because the hypothalamus fails
8.Hard

In a patient with primary hypothyroidism, you would expect:

  1. ALow TSH and low free T4
  2. BHigh TSH and high free T4
  3. CHigh TSH and low free T4
  4. DLow TSH and high free T4

Answer key

  1. 1. C · Vitamin K
  2. 2. D · Kidney
  3. 3. C · Pepsin
  4. 4. C · Peripheral chemoreceptors in the carotid and aortic bodies
  5. 5. B · By firing action potentials more often
  6. 6. D · Increases about 16-fold
  7. 7. C · High T4 and low TSH, because antibodies stimulate the TSH receptor
  8. 8. C · High TSH and low free T4

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