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 does bile do to fats in the small intestine?

  1. AEmulsifies them into small droplets
  2. BBreaks them into amino acids
  3. CAbsorbs them directly into the blood
  4. DConverts them into glucose
2.Easy

In which direction does oxygen move during gas exchange in the lungs?

  1. AFrom the alveoli into the blood
  2. BFrom the blood into the bronchi
  3. CFrom the blood into the alveoli
  4. DFrom the pleura into the blood
3.Easy

What is the main function of platelets?

  1. AFighting infection
  2. BCarrying carbon dioxide
  3. CBlood clotting
  4. DProducing antibodies
4.Medium

Mean arterial pressure is approximately equal to:

  1. ACardiac output × total peripheral resistance
  2. BStroke volume × total peripheral vascular resistance
  3. CCardiac output ÷ heart rate
  4. DHeart rate × stroke volume
5.Medium

What does the QRS complex on an ECG represent?

  1. AVentricular depolarisation
  2. BVentricular repolarisation
  3. CAtrial repolarisation
  4. DAtrial depolarisation
6.Medium

The hormone secretin is released when acid enters the duodenum. What is its main effect?

  1. AInsulin release from the endocrine pancreas
  2. BContraction of the gallbladder
  3. CAcid secretion from the stomach
  4. DBicarbonate secretion from the pancreas
7.Hard

Why does ketoacidosis typically develop in untreated type 1 diabetes but rarely in type 2?

  1. AType 1 patients have more glucagon receptors
  2. BType 2 patients cannot make ketones at all
  3. CEven low insulin levels suppress lipolysis and ketogenesis
  4. DKetones are only made in children
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. ALoss of motor neurons in the spinal cord
  2. BAntibodies against acetylcholine receptors at the neuromuscular junction
  3. CA defect in the dystrophin protein of muscle
  4. DDemyelination of central nervous system tracts

Answer key

  1. 1. A · Emulsifies them into small droplets
  2. 2. A · From the alveoli into the blood
  3. 3. C · Blood clotting
  4. 4. A · Cardiac output × total peripheral resistance
  5. 5. A · Ventricular depolarisation
  6. 6. D · Bicarbonate secretion from the pancreas
  7. 7. C · Even low insulin levels suppress lipolysis and ketogenesis
  8. 8. B · Antibodies against acetylcholine receptors at the neuromuscular junction

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