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

What is the liquid part of blood in which the cells are suspended called?

  1. APlasma
  2. BInterstitial fluid
  3. CCytoplasm
  4. DLymph
2.Easy

What does bile do to fats in the small intestine?

  1. AEmulsifies them into small droplets
  2. BConverts them into glucose
  3. CBreaks them into amino acids
  4. DAbsorbs them directly into the blood
3.Easy

Which enzyme begins protein digestion in the stomach?

  1. ALactase
  2. BPepsin
  3. CAmylase
  4. DLipase
4.Medium

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

  1. AInsulin release after a meal
  2. BADH release when plasma osmolality rises
  3. COxytocin release during labour
  4. DSweating when body temperature rises
5.Medium

Besides lowering glucose, insulin moves which ion into cells, an effect used to treat hyperkalaemia?

  1. ASodium
  2. BPotassium
  3. CChloride
  4. DCalcium
6.Medium

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

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

According to the length–tension relationship, why does a skeletal muscle fibre produce less force when overstretched?

  1. AThe neuromuscular junction stops working
  2. BThe muscle runs out of ATP when stretched
  3. CActin and myosin overlap less, so fewer cross-bridges form
  4. DCalcium is no longer released from the sarcoplasmic reticulum when stretched
8.Hard

Spirometry shows reduced FEV1 and reduced FVC, with a normal or high FEV1/FVC ratio. What pattern is this?

  1. AA restrictive pattern, as in pulmonary fibrosis
  2. BAn obstructive pattern, as in emphysema or chronic bronchitis
  3. CA normal result in an older adult
  4. DAn obstructive pattern, as in asthma

Answer key

  1. 1. A · Plasma
  2. 2. A · Emulsifies them into small droplets
  3. 3. B · Pepsin
  4. 4. C · Oxytocin release during labour
  5. 5. B · Potassium
  6. 6. D · A rise in arterial CO₂
  7. 7. C · Actin and myosin overlap less, so fewer cross-bridges form
  8. 8. A · A restrictive pattern, as in pulmonary fibrosis

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