Q4 of 41 Page 207

The diagram given below represents the liver, kidney and some associated blood vessels. Identify the vessel from the labelled parts A-D in which the blood will contain the lowest concentration of urea?

The urea is formed by the urea-cycle in the liver, and not in the kidneys. The blood vessel coming out from the kidney will contain the lowest concentration of urea (although kidneys contain only a small amount of urea to maintain osmolarity). And the blood vessel coming out from the liver will contain the highest concentration of urea.

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2

The diagram given below shows the human excretory system.


Identify the function of part labelled as x

 3

In the figure given below the structures associated with human kidneys are marked (X,Y and Z). The relative concentrations of urea in these structure is

 5

A healthy woman consumes a litre of water at once.

(i) How will be the internal environment of her body affected by this?


(ii) A corrective measure to bring the arising condition to normal state is?


Select the correct option for (i) and (ii) from those given below


 6

Which substances will be present in the glomerular filterate from the kidneys of a mammal?