The Human Eye (Grade 12 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which photoreceptors work in dim light and provide black and white vision?
Which photoreceptors work in dim light and provide black and white vision?
Rods
What is the main function of the cornea's convex shape?
What is the main function of the cornea's convex shape?
To bend (refract) incoming light rays
Why is the choroid layer dark and pigmented?
Why is the choroid layer dark and pigmented?
To prevent light bouncing inside eye
Which area of the retina provides the clearest, sharpest vision?
Which area of the retina provides the clearest, sharpest vision?
Yellow spot
When viewing a near object, what happens to the lens?
When viewing a near object, what happens to the lens?
Becomes more convex (rounded)
What is the state of suspensory ligaments when viewing distant objects?
What is the state of suspensory ligaments when viewing distant objects?
Taut (tight)
In bright light, which muscles of the iris contract?
In bright light, which muscles of the iris contract?
Circular muscles
What happens to the pupil in dim light conditions?
What happens to the pupil in dim light conditions?
Dilates (becomes larger)
What advantage does stereoscopic vision provide?
What advantage does stereoscopic vision provide?
Judge distance, depth & size accurately
Which type of lens corrects myopia (short-sightedness)?
Which type of lens corrects myopia (short-sightedness)?
Concave lenses