Question 1 Medium
Name the muscles that change the shape of the lens.
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Answer: ciliary muscles
- They are attached to the ligaments.
- They are the ciliary muscles.
The brain and the eye: GCSE Combined Science Biology practice questions
A second set of questions on the brain and the eye. They are different from the ones on the topic page. Try each, then open the answer and compare your working.
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Question 2 Medium
What is the name for the process of changing lens shape to focus on near or far objects?
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Answer: accommodation
- The eye adjusts to distance.
- It is accommodation.
Question 3 Medium
Which receptor cells in the retina detect colour?
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Answer: cones
- Rods work in dim light.
- Cones detect colour.
Question 4 Medium
What is the name of the hole in the middle of the iris that lets light in?
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Answer: pupil
- The iris surrounds a gap.
- The gap is the pupil.
Question 5 Hard
Which type of lens corrects short sight?
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Answer: concave
- The light must spread out first.
- A concave lens is used.
Question 6 Hard
Which type of lens corrects long sight?
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Answer: convex
- The light must be brought together.
- A convex lens is used.
Question 7 Hard
When looking at a near object, do the ciliary muscles contract or relax?
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Answer: contract
- The lens must be thick.
- The ciliary muscles contract.
Question 8 Hard
Name the type of scan used to see which parts of the brain are active.
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Answer: MRI
- It shows brain activity.
- It is an MRI scan.
Quick checks
Short questions with options. Choose one before you open the answer.
Check 1
What does the cerebral cortex control?
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Consciousness, intelligence, memory and language.
Check 2
What does the cerebellum control?
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Balance and the coordination of movement.
Check 3
What does the medulla control?
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Unconscious activities such as breathing and heart rate.
Check 4
How do scientists study the brain?
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Patients with brain damage, electrical stimulation and MRI scans.
Check 5
Why is treating the brain difficult?
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It is delicate and complex and hard to reach.
Check 6
What does the cornea do?
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It refracts light as it enters the eye.
Check 7
What does the iris do?
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It controls the size of the pupil.
Check 8
What does the lens do?
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It focuses light onto the retina.
Check 9
What is in the retina?
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Light receptor cells, called rods and cones.
Check 10
What do rods and cones do?
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Rods work in dim light. Cones detect colour.
Check 11
What happens to the pupil in bright light?
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It gets smaller.
Check 12
What is accommodation?
Show answer
Changing the shape of the lens to focus on near or far objects.
Check 13
What happens when you look at a near object?
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The ciliary muscles contract, the ligaments slacken and the lens is thicker.
Check 14
What happens when you look at a distant object?
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The ciliary muscles relax, the ligaments tighten and the lens is thin.
Check 15
What is myopia and how is it corrected?
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Short sight. A concave lens.
Check 16
What is hyperopia and how is it corrected?
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Long sight. A convex lens.
Check 17
What does consciousness mean?
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Being aware of what is happening around you.
Check 18
What are unconscious activities?
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Things your body does without you thinking, such as breathing.
Check 19
What does refract mean?
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To bend light.
Check 20
What are rods and cones?
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Receptor cells in the retina. Rods work in dim light and cones detect colour.
Check 21
What is a reflex?
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A fast, automatic response.
Check 22
What do the suspensory ligaments do?
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They hold the lens, and their tension changes the shape of the lens.
Check 23
Where does light focus in short sight?
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In front of the retina.
Check 24
Where does light focus in long sight?
Show answer
Behind the retina.
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