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

Most homeostatic control systems in the body work by:

  1. APositive feedback
  2. BNegative feedback
  3. CFeed-forward only
  4. DRandom variation
2.Easy

What is normal core body temperature in an adult, approximately?

  1. A36 °C
  2. B38.5 °C
  3. C37 °C
  4. D35 °C
3.Easy

Which pituitary hormone stimulates the thyroid gland?

  1. ALuteinising hormone (LH)
  2. BThyroid-stimulating hormone (TSH)
  3. CGrowth hormone (GH)
  4. DAdrenocorticotropic hormone (ACTH)
4.Medium

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

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

Which hormone is released by the adrenal cortex in response to ACTH?

  1. ACortisol
  2. BAdrenaline
  3. CThyroxine
  4. DAldosterone, as the main response
6.Medium

Which is a classic example of positive feedback in the body?

  1. ASweating when body temperature rises
  2. BOxytocin release during labour
  3. CInsulin release after a meal
  4. DADH release when plasma osmolality rises
7.Hard

Why does left ventricular failure cause pulmonary oedema?

  1. AThe bronchial arteries become blocked
  2. BPlasma oncotic pressure in the lungs rises sharply
  3. CRaised left atrial pressure increases pulmonary capillary hydrostatic pressure
  4. DThe right ventricle pumps less blood into the lungs
8.Hard

A patient with small-cell lung cancer has low plasma sodium and low plasma osmolality but inappropriately concentrated urine. What is the most likely explanation?

  1. ASyndrome of inappropriate ADH secretion
  2. BCranial diabetes insipidus
  3. CAddison's disease with high aldosterone
  4. DPrimary hyperaldosteronism

Answer key

  1. 1. B · Negative feedback
  2. 2. C · 37 °C
  3. 3. B · Thyroid-stimulating hormone (TSH)
  4. 4. D · It slows the heart rate
  5. 5. A · Cortisol
  6. 6. B · Oxytocin release during labour
  7. 7. C · Raised left atrial pressure increases pulmonary capillary hydrostatic pressure
  8. 8. A · Syndrome of inappropriate ADH secretion

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