11.3b The Kidney

26/11/2013 § Leave a comment

How many more days ’til Christmas, Santa?????

 

DATA BASED QUESTIONS

Page 248, medulla thickness and urine concentration

1. Discuss the relationship between the maximum solute concentration of urine and the habitat of the mammal. –> Disregarding Octomys mimax and the cat, animals in a dried habitat have a higher maximum solute concentration of urine. The Octomys mimax and cat have mOsm levels that suggest their maximum solute concentration of urine can compete with that of the other binomial creatures and that their bodies are developed to be able to withstand that environment.

2. Plot a scattergraph of the data in the table, either by hand or using a computer software.

Screen Shot 2013-11-21 at 12.40.50 PM

3.

  • a) Using the scattergraph that you have plotted, state the relationship between RMT and the maximum solute concentration of the urine. –> RMT and MSC share a linear relationship. As one increases, the other also increases.
  • b) Suggest how the thickness of the medulla could affect the maximum solute concentration of the urine. –> The loop of Henlé is responsible for creating a gradient of solute concentration in the medulla. The thickness of the medulla (RMT) would increase the membrane that solutes would have to pass through. This means that the urine that the loop of Henlé would filter would retain a high level of solute concentration.

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