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, made mainly by the kidneys, stimulates red blood cell production?

  1. AThrombopoietin
  2. BRenin
  3. CAldosterone
  4. DErythropoietin
2.Easy

Which part of the nervous system is responsible for the "fight or flight" response?

  1. AParasympathetic nervous system
  2. BSympathetic nervous system
  3. CSomatic nervous system
  4. DEnteric nervous system
3.Easy

Which ion triggers contraction by binding to troponin in skeletal muscle?

  1. AChloride
  2. BPotassium
  3. CCalcium
  4. DSodium
4.Medium

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

  1. ABicarbonate secretion from the pancreas
  2. BInsulin release from the endocrine pancreas
  3. CAcid secretion from the stomach
  4. DContraction of the gallbladder
5.Medium

What does the QRS complex on an ECG represent?

  1. AVentricular repolarisation
  2. BAtrial depolarisation
  3. CAtrial repolarisation
  4. DVentricular depolarisation
6.Medium

Why is the oxygen–haemoglobin dissociation curve S-shaped?

  1. ARed cells change size as they take up oxygen
  2. BBinding of one oxygen makes the next bind more easily
  3. CHaemoglobin can bind only one oxygen molecule
  4. DOxygen dissolves better in plasma at high partial pressure
7.Hard

At the start of a fever, a patient shivers and feels cold even though body temperature is rising. Why?

  1. APyrogens raise the hypothalamic set point above the current body temperature
  2. BSweating has already cooled the body too much
  3. CThe body has lost its ability to produce heat
  4. DThe thermoreceptors in the skin are destroyed
8.Hard

A patient's arterial blood gas shows pH 7.30, PaCO₂ 7.8 kPa (59 mmHg) and normal bicarbonate. What is the most likely disturbance?

  1. AMetabolic acidosis
  2. BAcute respiratory acidosis
  3. CRespiratory alkalosis
  4. DCompensated metabolic alkalosis

Answer key

  1. 1. D · Erythropoietin
  2. 2. B · Sympathetic nervous system
  3. 3. C · Calcium
  4. 4. A · Bicarbonate secretion from the pancreas
  5. 5. D · Ventricular depolarisation
  6. 6. B · Binding of one oxygen makes the next bind more easily
  7. 7. A · Pyrogens raise the hypothalamic set point above the current body temperature
  8. 8. B · Acute respiratory acidosis

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