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 functional unit of the kidney?

  1. AGlomerulus
  2. BRenal pyramid
  3. CNephron
  4. DCollecting duct
2.Easy

Which gland is often called the "master gland" because it controls many other endocrine glands?

  1. APituitary gland
  2. BThyroid gland
  3. CAdrenal gland
  4. DPineal gland
3.Easy

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

  1. ACytoplasm
  2. BLymph
  3. CInterstitial fluid
  4. DPlasma
4.Medium

How is the ejection fraction calculated?

  1. ACardiac output ÷ heart rate
  2. BEnd-diastolic volume ÷ end-systolic volume
  3. CEnd-systolic volume ÷ stroke volume
  4. DStroke volume ÷ end-diastolic volume
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 constricts the coronary arteries
  4. DIt increases the heart rate
6.Medium

In which form is most carbon dioxide carried in the blood?

  1. ABound to the haem iron
  2. BAs bicarbonate ions in plasma
  3. CDissolved as CO₂ gas
  4. DAs carbonic acid in platelets
7.Hard

A healthy person stands up quickly after lying down. Which reflex response prevents fainting?

  1. AThe baroreceptor reflex raises heart rate and vasoconstriction
  2. BADH release immediately doubles blood volume
  3. CThe Bainbridge reflex lowers heart rate
  4. DThe chemoreceptor reflex raises breathing rate and arterial oxygen levels
8.Hard

After several days of persistent vomiting of stomach contents, which acid–base disturbance is most likely?

  1. ARespiratory alkalosis
  2. BMetabolic alkalosis
  3. CMetabolic acidosis
  4. DRespiratory acidosis

Answer key

  1. 1. C · Nephron
  2. 2. A · Pituitary gland
  3. 3. D · Plasma
  4. 4. D · Stroke volume ÷ end-diastolic volume
  5. 5. B · It slows the heart rate
  6. 6. B · As bicarbonate ions in plasma
  7. 7. A · The baroreceptor reflex raises heart rate and vasoconstriction
  8. 8. B · Metabolic alkalosis

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