BIOLOGY

JAMB 2016 - Question 37

Biology 2016 JAMB Past Questions - Question 37: Which of the following organs regulates the levels of water, salts, hydrogen ions, and urea in the mammals?

Choose the most appropriate option for the gap .
Which of the following organs regulates the levels of water, salts, hydrogen ions, and urea in the mammals?
A:
B:
C:
D:
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Correct Answer

A

Explanation

The kidney excretes excess water, urea and salt in form of urine: it also regulates the acid-base balance in the blood. When the blood is acidic the kidney excretes the acid radicals i.e. excess hydrogen ion to restore the balance. lf the blood is basic, the kidney excretes more basic ions i.e hydroxy? 1v ions (OH") to restorethe acid-base balance.Colon is part of the iargeintestine that receives large quantity of undigested materials from the small intestine. Water is reabsorbed from the undigested materials and returned to the body. The semi solid undigested material is passetiko the rectum for temporary storage as faeces. Bladder is used for the storage of urine. Liver breads down excess amino acids in, the blood converting them into urea and glycogen among other numerous functions.