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

What is the functional unit of the kidney?

  1. ARenal pyramid
  2. BGlomerulus
  3. CNephron
  4. DCollecting duct
2.Easy

What is the normal resting heart rate range for a healthy adult?

  1. A20 to 40 beats per minute
  2. B40 to 60 beats per minute
  3. C60 to 100 beats per minute
  4. D100 to 140 beats per minute
3.Easy

Which cells secrete antibodies?

  1. AMacrophages
  2. BHelper T cells
  3. CNeutrophils
  4. DPlasma cells
4.Medium

In which form is most carbon dioxide carried in the blood?

  1. ADissolved as CO₂ gas
  2. BAs carbonic acid in platelets
  3. CAs bicarbonate ions in plasma
  4. DBound to the haem iron
5.Medium

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

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

What is the normal pH range of arterial blood?

  1. A6.80 to 7.00
  2. B7.35 to 7.45
  3. C7.00 to 7.20
  4. D7.50 to 7.65
7.Hard

At the start of a fever, a patient shivers and feels cold even though body temperature is rising. Why?

  1. APyrogens raise the hypothalamic set point above the current body temperature
  2. BSweating has already cooled the body too much
  3. CThe body has lost its ability to produce heat
  4. DThe thermoreceptors in the skin are destroyed
8.Hard

A young woman has muscle weakness that gets worse with repeated use and improves with an acetylcholinesterase inhibitor. What is the most likely mechanism?

  1. ADemyelination of central nervous system tracts
  2. BAntibodies against acetylcholine receptors at the neuromuscular junction
  3. CLoss of motor neurons in the spinal cord
  4. DA defect in the dystrophin protein of muscle

Answer key

  1. 1. C · Nephron
  2. 2. C · 60 to 100 beats per minute
  3. 3. D · Plasma cells
  4. 4. C · As bicarbonate ions in plasma
  5. 5. A · The impulse jumps between nodes of Ranvier
  6. 6. B · 7.35 to 7.45
  7. 7. A · Pyrogens raise the hypothalamic set point above the current body temperature
  8. 8. B · Antibodies against acetylcholine receptors at the neuromuscular junction

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