Combined Science mock quiz.

Why can brain damage from a stroke sometimes recover partially over months, even though damaged neurones do not regenerate?

• Adamaged neurones eventually regrow and reconnect over time
• Bthe brain shows plasticity: surviving neurones can form new connections, take over functions previously performed by damaged regions, and learn alternative pathways - this is the basis of rehabilitation therapy after stroke
• Cstroke damage is always reversed automatically within weeks
• Dthe body grows new neurones from stem cells in the bone marrow to replace dead ones

Choose an answer — or press 1234