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

Where is most of the nutrient absorption in the digestive tract?

  1. ASmall intestine
  2. BOesophagus
  3. CLarge intestine
  4. DStomach
2.Easy

Which enzyme begins protein digestion in the stomach?

  1. APepsin
  2. BLipase
  3. CAmylase
  4. DLactase
3.Easy

Which hormones are the main regulators of the body's basal metabolic rate?

  1. AOestrogen and progesterone (ovarian steroids)
  2. BInsulin and glucagon
  3. CMelatonin and serotonin
  4. DThyroid hormones (T3 and T4)
4.Medium

Why can cardiac muscle not be tetanised like skeletal muscle?

  1. AIt is not striated
  2. BIts long refractory period lasts almost as long as the contraction
  3. CIt has no calcium in the sarcoplasmic reticulum
  4. DIt is controlled only by hormones
5.Medium

Why do myelinated axons conduct action potentials faster than unmyelinated ones?

  1. AMyelin contains more sodium channels
  2. BMyelin makes the axon thinner
  3. CThe impulse jumps between nodes of Ranvier
  4. DMyelin releases neurotransmitter along the axon
6.Medium

What causes the first heart sound (S1)?

  1. AClosure of the aortic and pulmonary valves
  2. BClosure of the mitral and tricuspid valves
  3. COpening of the aortic valve
  4. DBlood filling the atria
7.Hard

Spirometry shows reduced FEV1 and reduced FVC, with a normal or high FEV1/FVC ratio. What pattern is this?

  1. AA normal result in an older adult
  2. BA restrictive pattern, as in pulmonary fibrosis
  3. CAn obstructive pattern, as in asthma
  4. DAn obstructive pattern, as in emphysema or chronic bronchitis
8.Hard

A patient with diabetic ketoacidosis breathes deeply and rapidly. What pattern is expected on the blood gas?

  1. ALow pH, high bicarbonate and high PaCO₂
  2. BLow pH, low bicarbonate and low PaCO₂
  3. CLow pH, normal bicarbonate and high PaCO₂
  4. DHigh pH, low bicarbonate and low PaCO₂

Answer key

  1. 1. A · Small intestine
  2. 2. A · Pepsin
  3. 3. D · Thyroid hormones (T3 and T4)
  4. 4. B · Its long refractory period lasts almost as long as the contraction
  5. 5. C · The impulse jumps between nodes of Ranvier
  6. 6. B · Closure of the mitral and tricuspid valves
  7. 7. B · A restrictive pattern, as in pulmonary fibrosis
  8. 8. B · Low pH, low bicarbonate and low PaCO₂

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