During an eye examination, an optician points out the tough, white layer that covers most of the outside of the eyeball. This layer protects the eye and helps it to keep its shape.
Which structure is the optician pointing out?
aqueous humour
vitreous humour
sclera
ciliary body
135 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.