Multiple choice

What protects the brain from mechanical shocks?

  1. Vitreous humour

  2. Aqueous humour

  3. Cerebrospinal fluid

  4. Lysozyme

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cerebrospinal fluid (CSF) surrounds the brain and spinal cord, providing cushioning and protection against mechanical shocks. Vitreous and aqueous humour are fluids in the eye, while lysozyme is an enzyme found in tears and saliva - none protect the brain.