Parkinson's disease is caused by a lack of specific neurotransmitters. The graph shows the effect of age on the number of dopamine-producing cells in people who develop Parkinson's disease. In an investigation, different concentrations of dopamine were given to Drosophila (fruit flies). The mean heart rates of groups of 10 Drosophila were recorded at different concentrations of dopamine. The results are shown in the graph. Comment on the results of this investigation. (4) ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................
Exam No：WBI1501-que-20241024 Year：2024 Question No：4(c)
Answer:
An answer that includes the following points:
- as dopamine concentration increases the (mean) heart rate increases and then decreases (1)
- correct comment on mean heart rate increasing up to \(\{3 / 4\} /\) decreasing after 4 or at 5\(\}\) (1)
- correct comment on error bars and \{significant difference / no significant difference / significant effect\} (1)
- accept relevant comment on methodology (1)
- as dopamine concentration increases the (mean) heart rate increases and then decreases (1)
- correct comment on mean heart rate increasing up to \(\{3 / 4\} /\) decreasing after 4 or at 5\(\}\) (1)
- correct comment on error bars and \{significant difference / no significant difference / significant effect\} (1)
- accept relevant comment on methodology (1)
Knowledge points:
CH8 – Coordination, Response and Gene Technology
Solution:
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