Other questions in this quiz

2. What is apoptosis and why does it occur?

  • Programmed cell death of poorly stimulated neurons; increases efficiency of functioning
  • Increase of brain surface; to increase cell stimulation
  • The formation of sulci and gyri to accommodate more neurons
  • Buildings of connections between synapses to 'finely tune' the brains 'circuitry'

3. What is a teratogen?

  • A chemical imbalance in the pregnant body which goes on to affect the infant
  • Substances that exert an adverse influence on development e.g drugs, smoking, disease and maternal stress
  • Substances that exert a positive influence on development e.g enriched environment, nutrition and exercise
  • A genetic mutation in the mother which causes future disabilitys and birth complications in the infant

4. When does brain growth begin in utero?

  • 18 days
  • 14 days
  • 6 months
  • 8 months

5. What does the process of myelinisation do/improve?

  • Produces nerve cells at a rate of 250,000pm
  • Adds to the weight of the total brain
  • Insulates the cell and improves synaptogenesis (cell communication)
  • Allows cells to acquire specialised functions


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