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 hormone, released by the pineal gland in darkness, helps regulate the sleep–wake cycle?

  1. ACortisol
  2. BMelatonin
  3. COxytocin
  4. DAdrenaline
2.Easy

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

  1. ASmall intestine
  2. BStomach
  3. COesophagus
  4. DLarge intestine
3.Easy

Which part of the brain regulates body temperature, hunger and thirst?

  1. AMedulla oblongata
  2. BCerebellum
  3. CHypothalamus
  4. DOccipital lobe
4.Medium

Why does glucose appear in the urine in uncontrolled diabetes mellitus?

  1. AThe filtered load exceeds the tubular transport maximum
  2. BInsulin is needed for glucose reabsorption in the tubule
  3. CThe glomerulus stops filtering glucose
  4. DThe collecting duct actively secretes glucose
5.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 making each action potential longer
  4. DBy changing the neurotransmitter it releases
6.Medium

Mean arterial pressure is approximately equal to:

  1. AStroke volume × total peripheral vascular resistance
  2. BHeart rate × stroke volume
  3. CCardiac output × total peripheral resistance
  4. DCardiac output ÷ heart rate
7.Hard

Which combination of signs is expected in a patient in early hypovolaemic shock after major bleeding?

  1. ATachycardia, cool pale skin and reduced urine output
  2. BBradycardia, warm flushed skin and high urine output
  3. CBradycardia, cool pale skin and high urine output
  4. DTachycardia, warm flushed skin and high urine output
8.Hard

In Otto Loewi's classic experiment, fluid from a vagus-stimulated frog heart slowed a second heart. What did this show?

  1. ANerves pass signals to their targets by releasing a chemical
  2. BThe heart beats without any nerve supply
  3. CNerve impulses spread through the fluid directly as electricity
  4. DThe vagus nerve speeds up the heart

Answer key

  1. 1. B · Melatonin
  2. 2. A · Small intestine
  3. 3. C · Hypothalamus
  4. 4. A · The filtered load exceeds the tubular transport maximum
  5. 5. B · By firing action potentials more often
  6. 6. C · Cardiac output × total peripheral resistance
  7. 7. A · Tachycardia, cool pale skin and reduced urine output
  8. 8. A · Nerves pass signals to their targets by releasing a chemical

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