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 cells secrete antibodies?

  1. ANeutrophils
  2. BPlasma cells
  3. CMacrophages
  4. DHelper T cells
2.Easy

Which hormone, made mainly by the kidneys, stimulates red blood cell production?

  1. AAldosterone
  2. BRenin
  3. CThrombopoietin
  4. DErythropoietin
3.Easy

What is tidal volume?

  1. AThe maximum volume of air that can be breathed out after a full breath in
  2. BThe total volume of air in the lungs
  3. CThe volume of air moved in or out in one normal breath
  4. DThe air left in the lungs after a full exhalation
4.Medium

What is the main stimulus for breathing in a healthy person?

  1. AA fall in arterial O₂
  2. BA rise in blood glucose
  3. CA fall in blood pH caused by lactate only
  4. DA rise in arterial CO₂
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. CIncreases about 16-fold
  4. DHalves
6.Medium

What causes the first heart sound (S1)?

  1. AClosure of the mitral and tricuspid valves
  2. BOpening of the aortic valve
  3. CBlood filling the atria
  4. DClosure of the aortic and pulmonary valves
7.Hard

Hodgkin and Huxley's classic studies of the ionic basis of the action potential used which preparation?

  1. AThe frog sciatic nerve–muscle preparation
  2. BCultured human cortical neurons
  3. CThe squid giant axon
  4. DThe cat spinal cord
8.Hard

A patient's arterial blood gas shows pH 7.30, PaCO₂ 7.8 kPa (59 mmHg) and normal bicarbonate. What is the most likely disturbance?

  1. ACompensated metabolic alkalosis
  2. BMetabolic acidosis
  3. CAcute respiratory acidosis
  4. DRespiratory alkalosis

Answer key

  1. 1. B · Plasma cells
  2. 2. D · Erythropoietin
  3. 3. C · The volume of air moved in or out in one normal breath
  4. 4. D · A rise in arterial CO₂
  5. 5. C · Increases about 16-fold
  6. 6. A · Closure of the mitral and tricuspid valves
  7. 7. C · The squid giant axon
  8. 8. C · Acute respiratory acidosis

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