GCSE Biology- The Eye Exam Questions
and Answers
cornea - ANSWER-refracts light and protects eye
iris - ANSWER-controls how much light enters eye
lens - ANSWER-focuses light onto retina
optic nerve - ANSWER-carries impulses to brain
retina - ANSWER-layer of tissue at the back of the eye that contains photoreceptor cells
sclera - ANSWER-tough outer layer
vitreous humour - ANSWER-maintains shape of eye
aqueous humour - ANSWER-maintains pressure in eye and nourishes cornea
ciliary muscles - ANSWER-change shape of lens for accommodation
rod cells - ANSWER-detect black and white
cone cells - ANSWER-detect color, need bright light
accommodation - distant object - ANSWER-ciliary muscles contract, suspensory
ligaments tighten, lens is pulled thin
accommodation - close object - ANSWER-ciliary muscles relax, suspensory ligaments
slacken, lens becomes fatter
and Answers
cornea - ANSWER-refracts light and protects eye
iris - ANSWER-controls how much light enters eye
lens - ANSWER-focuses light onto retina
optic nerve - ANSWER-carries impulses to brain
retina - ANSWER-layer of tissue at the back of the eye that contains photoreceptor cells
sclera - ANSWER-tough outer layer
vitreous humour - ANSWER-maintains shape of eye
aqueous humour - ANSWER-maintains pressure in eye and nourishes cornea
ciliary muscles - ANSWER-change shape of lens for accommodation
rod cells - ANSWER-detect black and white
cone cells - ANSWER-detect color, need bright light
accommodation - distant object - ANSWER-ciliary muscles contract, suspensory
ligaments tighten, lens is pulled thin
accommodation - close object - ANSWER-ciliary muscles relax, suspensory ligaments
slacken, lens becomes fatter
