Which component of the nervous system receives impulses from receptors?
AThe response
BThe coordinator
CThe effector
DThe motor neurone
Answer & Solution
Correct answer: B. The coordinator
1. The coordinator is the brain and spinal cord, together the central nervous system.
2. It receives messages arriving from receptors and interprets them.
3. A response is any change the organism shows in reacting to a stimulus, so it comes last, not first.
4. An effector is a cell, organelle or organ that receives motor impulses from the brain or spinal cord and produces the response.
5. A motor neurone carries impulses away from the central nervous system to effectors, which is the opposite direction.
_Source: NECTA CSEE 2022 Biology 033, Question 1: Multiple Choice Items, item (i)_
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