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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Name: ____________________   Date: ____________

1.Easy

Which hormone is mainly produced by the testes?

  1. AProlactin
  2. BTestosterone
  3. COxytocin
  4. DProgesterone
2.Easy

Which cells secrete antibodies?

  1. AMacrophages
  2. BHelper T cells
  3. CPlasma cells
  4. DNeutrophils
3.Easy

Which structure of the inner ear converts sound vibrations into nerve signals?

  1. AAuditory tube
  2. BTympanic membrane
  3. CSemicircular canals
  4. DCochlea
4.Medium

Where is the heart's natural pacemaker?

  1. APurkinje fibres
  2. BAtrioventricular node
  3. CSinoatrial node
  4. DBundle of His
5.Medium

Which receptors respond mainly to a fall in arterial oxygen levels?

  1. APeripheral chemoreceptors in the carotid and aortic bodies
  2. BStretch receptors in the lungs
  3. CBaroreceptors in the carotid sinus
  4. DCentral chemoreceptors in the medulla
6.Medium

Low plasma albumin, as in severe liver disease, causes oedema mainly because:

  1. ALymphatic drainage increases
  2. BPlasma oncotic pressure falls
  3. CThe capillaries become impermeable
  4. DCapillary hydrostatic pressure falls
7.Hard

After a head injury, a patient passes large volumes of very dilute urine and plasma sodium rises. What is the most likely cause?

  1. AExcess ADH release (SIADH)
  2. BLack of ADH release (cranial diabetes insipidus)
  3. CExcess aldosterone
  4. DUncontrolled diabetes mellitus
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. BLocal metabolites such as CO₂, H⁺, K⁺ and adenosine dilate the arterioles
  3. CSympathetic stimulation constricts the muscle arterioles via alpha receptors
  4. DThe heart pumps blood only to the muscles

Answer key

  1. 1. B · Testosterone
  2. 2. C · Plasma cells
  3. 3. D · Cochlea
  4. 4. C · Sinoatrial node
  5. 5. A · Peripheral chemoreceptors in the carotid and aortic bodies
  6. 6. B · Plasma oncotic pressure falls
  7. 7. B · Lack of ADH release (cranial diabetes insipidus)
  8. 8. B · Local metabolites such as CO₂, H⁺, K⁺ and adenosine dilate the arterioles

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