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.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy

Which blood cells carry most of the oxygen in the blood?

  1. ARed blood cells
  2. BPlatelets
  3. CWhite blood cells
  4. DPlasma cells
2.Easy

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

  1. AMedulla oblongata
  2. BOccipital lobe
  3. CCerebellum
  4. DHypothalamus
3.Easy

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

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

Where does the final activation step of vitamin D (1-alpha hydroxylation) take place?

  1. ASkin
  2. BLiver
  3. CKidney
  4. DSmall intestine
5.Medium

What is the main effect of vagus nerve stimulation on the heart?

  1. AIt increases ventricular contractility strongly
  2. BIt slows the heart rate
  3. CIt increases the heart rate
  4. DIt constricts the coronary arteries
6.Medium

What is the main function of pulmonary surfactant?

  1. ATo trap dust in the bronchi
  2. BTo carry oxygen across the alveolar wall
  3. CTo kill bacteria in the airways
  4. DTo reduce surface tension in the alveoli
7.Hard

A patient with diabetic ketoacidosis breathes deeply and rapidly. What pattern is expected on the blood gas?

  1. AHigh pH, low bicarbonate and low PaCO₂
  2. BLow pH, low bicarbonate and low PaCO₂
  3. CLow pH, normal bicarbonate and high PaCO₂
  4. DLow pH, high bicarbonate and high PaCO₂
8.Hard

During exercise, blood flow to active skeletal muscle rises greatly. What is the main cause?

  1. AThe parasympathetic system dilates all arteries
  2. BSympathetic stimulation constricts the muscle arterioles via alpha receptors
  3. CLocal metabolites such as CO₂, H⁺, K⁺ and adenosine dilate the arterioles
  4. DThe heart pumps blood only to the muscles

Answer key

  1. 1. A · Red blood cells
  2. 2. D · Hypothalamus
  3. 3. B · Vitamin K
  4. 4. C · Kidney
  5. 5. B · It slows the heart rate
  6. 6. D · To reduce surface tension in the alveoli
  7. 7. B · Low pH, low bicarbonate and low PaCO₂
  8. 8. C · Local metabolites such as CO₂, H⁺, K⁺ and adenosine dilate the arterioles

Full step-by-step solutions: practise this topic on examproblems.com.