Exam (elaborations)
2024 AQA A LEVEL BIOLOGY RECEPTORS YEAR 2 EXAM WITH CORRECT ANSWERS
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2024 AQA A LEVEL BIOLOGY RECEPTORS YEAR 2 EXAM WITH CORRECT ANSWERS
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2024 AQA A LEVEL BIOLOGYRECEPTORS YEAR 2 EXAM WITH
CORRECT ANSWERS
What is a receptor? - CORRECT-ANSWERSCell or protein on cell membrane
which detects stimulus
How do receptors work? - CORRECT-ANSWERSSpecific to one stimulus
Convert energy of stimulus to electrical energy
What is the generator potential? - CORRECT-ANSWERSChange in potential of
receptor due to stimulus
What does the optic nerve do? - CORRECT-ANSWERSSend impulses to the
brain
What are rod cells? - CORRECT-ANSWERSReceptors with a high sensitivity to
light
Found in peripheral parts of retina
What is the visual acuity of rods and cones? - CORRECT-ANSWERSRods is low
Cones is high
What colour is the information given by rods and cones? - CORRECT-
ANSWERSRods is black and white
Cones is in colour
How do rods have a high sensitivity to light? - CORRECT-ANSWERSMany rods
join on bipolar neurone
Many weaker generator potentials combine to reach threshold level and
trigger action potential
Why is it important that each cone cell is only joined to one bipolar neurone?
- CORRECT-ANSWERSGives high visual acuity
Can distinguish between two points that are close together
What is visual acuity? - CORRECT-ANSWERSThe ability to distinguish
between points that are close together
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