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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1.Easy

Which blood vessels have valves that prevent blood flowing backwards?

  1. AVeins
  2. BCapillaries
  3. CArteries
  4. DArterioles
2.Easy

What is the normal resting breathing rate of a healthy adult?

  1. AAbout 12 to 20 breaths per minute
  2. BAbout 4 to 8 breaths per minute
  3. CAbout 40 to 60 breaths per minute
  4. DAbout 25 to 35 breaths per minute
3.Easy

Which enzyme begins protein digestion in the stomach?

  1. ALipase
  2. BAmylase
  3. CPepsin
  4. DLactase
4.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 making each action potential larger
  3. CBy making each action potential longer
  4. DBy firing action potentials more often
5.Medium

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

  1. AThe whole sarcomere
  2. BH zone
  3. CA band
  4. DI band
6.Medium

Cardiac output equals heart rate multiplied by:

  1. ABlood pressure
  2. BStroke volume
  3. CPeripheral resistance
  4. DEjection fraction
7.Hard

Constriction of the efferent arteriole of a glomerulus, with the afferent arteriole unchanged, tends to:

  1. ALower glomerular capillary pressure and GFR
  2. BRaise glomerular capillary pressure and GFR
  3. CHave no effect on GFR at all
  4. DStop filtration completely
8.Hard

In the renin–angiotensin–aldosterone system, where is angiotensin I mainly converted to angiotensin II?

  1. AIn the adrenal cortex
  2. BIn the liver
  3. CIn the lungs
  4. DIn the kidneys' juxtaglomerular cells

Answer key

  1. 1. A · Veins
  2. 2. A · About 12 to 20 breaths per minute
  3. 3. C · Pepsin
  4. 4. D · By firing action potentials more often
  5. 5. C · A band
  6. 6. B · Stroke volume
  7. 7. B · Raise glomerular capillary pressure and GFR
  8. 8. C · In the lungs

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