
The fluid entering the renal tubule is called the filtrate.

Important Questions on Excretory System
Give appropriate biological or technical terms for the following:
Process of maintaining water and salt balance in the blood.

Correct the following statements by changing the underlined words:
The normal pale yellow colour of the urine is due to the presence of the pigment Melanin.

The diagram given below is that of a structure present in a human kidney. Study the same and answer the questions that follow:
What is the fluid that comes to part ‘2’ called? Name the main nitrogenous waste in it.


The diagram given below is that of a structure present in a human kidney. Study the same and answer the questions that follow:
What is the liquid entering part ‘1’ called? Name two substances present in this liquid that are reabsorbed in the tubule.






Comment upon the following :
Diameter of afferent arteriole and its capillaries is more than the diameter of efferent arteriole and its capillaries.

The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
What stage of urine formation takes place in part 3 and why?
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Read the given urine report and prepare a note on composition of normal urine.

Write briefly about the following as specified for each in the brackets.
Glomerulus (Process occurred and the fluid filtered out).



The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Name the fluid filtered from part 3?
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