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. AMacrophages
  2. BPlasma cells
  3. CHelper T cells
  4. DNeutrophils
2.Easy

Which neurotransmitter is released at the neuromuscular junction of skeletal muscle?

  1. ANoradrenaline
  2. BDopamine
  3. CSerotonin
  4. DAcetylcholine
3.Easy

What is the typical resting membrane potential of a neuron?

  1. AAbout +70 mV
  2. BAbout 0 mV
  3. CAbout −10 mV
  4. DAbout −70 mV
4.Medium

How is the ejection fraction calculated?

  1. AEnd-diastolic volume ÷ end-systolic volume
  2. BEnd-systolic volume ÷ stroke volume
  3. CStroke volume ÷ end-diastolic volume
  4. DCardiac output ÷ heart rate
5.Medium

What is anatomical dead space?

  1. AThe air that stays in the lungs after full exhalation (residual volume)
  2. BThe volume of the conducting airways where no gas exchange happens
  3. CAlveoli that have collapsed completely
  4. DThe space between the two pleural layers
6.Medium

Which is a classic example of positive feedback in the body?

  1. ASweating when body temperature rises
  2. BInsulin release after a meal
  3. CADH release when plasma osmolality rises
  4. DOxytocin release during labour
7.Hard

Why does a person with a high spinal cord injury above T1 risk low blood pressure?

  1. AThe sympathetic outflow to the vessels and heart is cut off
  2. BRenin release from the kidney stops completely
  3. CThe phrenic nerve can no longer control the tone of the arteries
  4. DThe vagus nerve is cut, so the heart rate rises
8.Hard

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

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

Answer key

  1. 1. B · Plasma cells
  2. 2. D · Acetylcholine
  3. 3. D · About −70 mV
  4. 4. C · Stroke volume ÷ end-diastolic volume
  5. 5. B · The volume of the conducting airways where no gas exchange happens
  6. 6. D · Oxytocin release during labour
  7. 7. A · The sympathetic outflow to the vessels and heart is cut off
  8. 8. D · Nerves pass signals to their targets by releasing a chemical

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