Short answerModerate3 marks
Name the three membranous coverings of the human brain.
Topic: Meninges
Previous-year question practice database
Answer
Exam answer
The three MENINGES, from outside inwards, are:
- DURA MATER — the tough, fibrous outermost membrane
- ARACHNOID MATER — the middle, web-like membrane
- PIA MATER — the thin, delicate innermost membrane, in direct contact with the brain tissue
Explanation
One mark each, and giving them IN ORDER from outside inwards is what shows you know their arrangement rather than just the names.
The names describe them: DURA means tough (it lies next to the bone), ARACHNOID means spider-like (from its web-like structure), PIA means tender or delicate.
CEREBROSPINAL FLUID lies between the ARACHNOID and the PIA mater — note the position, since questions ask for it. It cushions the brain against shock and supplies nutrients to the nerve cells, which have no direct blood supply reaching every neuron.
Their inflammation is MENINGITIS, a serious disease — a useful way to fix the collective name.
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