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. APlasma cells
  2. BNeutrophils
  3. CMacrophages
  4. DHelper T cells
2.Easy

The systolic blood pressure is the pressure in the arteries:

  1. AWhen the atria contract
  2. BWhen the ventricles contract
  3. CBetween two heartbeats, during diastole
  4. DWhen the ventricles relax
3.Easy

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

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

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

  1. AA fall in arterial O₂
  2. BA rise in arterial CO₂
  3. CA rise in blood glucose
  4. DA fall in blood pH caused by lactate only
5.Medium

What is the main effect of aldosterone on the kidney?

  1. AIncreased filtration in the glomerulus
  2. BWater reabsorption by inserting aquaporins only
  3. CGlucose reabsorption in the proximal tubule
  4. DSodium reabsorption and potassium secretion in the distal nephron
6.Medium

Since action potentials are all-or-none, how does a neuron signal a stronger stimulus?

  1. ABy making each action potential larger
  2. BBy firing action potentials more often
  3. CBy changing the neurotransmitter it releases
  4. DBy making each action potential longer
7.Hard

What is the main reason the ventricles do not contract at the same moment as the atria?

  1. AThe SA node fires twice per beat
  2. BThe ventricles have a longer refractory period only
  3. CThe Purkinje fibres conduct slowly
  4. DConduction is delayed at the atrioventricular node
8.Hard

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

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

Answer key

  1. 1. A · Plasma cells
  2. 2. B · When the ventricles contract
  3. 3. C · Vitamin K
  4. 4. B · A rise in arterial CO₂
  5. 5. D · Sodium reabsorption and potassium secretion in the distal nephron
  6. 6. B · By firing action potentials more often
  7. 7. D · Conduction is delayed at the atrioventricular node
  8. 8. D · Pyrogens raise the hypothalamic set point above the current body temperature

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