The kidney is involved in the reabsorption of solutes and water. A group of individuals gave a urine sample and then immediately drank $$\(1000 \mathrm{~cm}^{3}\)$$ of water. Urine samples were then collected at 30-minute intervals. The volumes and composition of urine produced were then recorded. The table and graph show the results of this investigation. Comment on the results of this investigation. Use the information in the table and the graph and your own knowledge to support your answer. (4) ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................
Exam No：wbi15-01-que-20240608 Year：2024 Question No：7(b)
Answer:
An answer that includes four of the following points:
- mean volume of urine production peaks at \{60 minutes / one hour\} (1)
- mean concentration of ions is lowest at \(\{60\) minutes / one hour\} (1)
- mean mass of urea peaks at \{60 minutes / one hour\} (1)
- at 150 minutes \{mass of urea / volume of urine / concentration of ions\} was same as \{at 0 mins / the start / returns to normal\} (1)
- mean mass of urea is greatest when volume of urine greatest (1)
- there is no indication of \{sample size / gender / health issues / hydrated prior to test\} (1)
- mean volume of urine production peaks at \{60 minutes / one hour\} (1)
- mean concentration of ions is lowest at \(\{60\) minutes / one hour\} (1)
- mean mass of urea peaks at \{60 minutes / one hour\} (1)
- at 150 minutes \{mass of urea / volume of urine / concentration of ions\} was same as \{at 0 mins / the start / returns to normal\} (1)
- mean mass of urea is greatest when volume of urine greatest (1)
- there is no indication of \{sample size / gender / health issues / hydrated prior to test\} (1)
Knowledge points:
CH7 – Respiration, Muscles and the Internal Environment
Solution:
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