An organism suffers severe damage across its whole nervous system. Which three abilities fail together?
ADetecting stimuli, transduction and transmission
BBreathing, digestion and excretion of urea
CGrowth, reproduction and cell division
DPhotosynthesis, respiration and transpiration
Answer & Solution
Correct answer: A. Detecting stimuli, transduction and transmission
1. A nervous system does three linked jobs in sequence.
2. Receptors detect a stimulus from inside or outside the body.
3. That stimulus is then converted into a nerve impulse, which is transduction.
4. The impulse is finally transmitted along neurones to the coordinator and on to effectors.
5. Severe damage breaks all three, so the organism cannot sense or respond. Answering that it 'could not see or hear' treats the neurone as a sense organ, which was the recorded error.
_Source: NECTA ACSEE 2022 Biology 133/1, Question 3: Coordination_
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