Question

This question consists of two statements, Assertion and Reason. While answering this question you are required to choose any one of the following five responses.

Assertion: Secreting hypotonic urine is effective in reducing urinary loss of water.

Reason: Hypotonic urine is more concentrated and higher in osmotic pressure than the blood.

Answer 1

• Mammals excrete concentrated urine to avoid excess loss of water from the body.
• The urine in mammals is hypertonic than blood having lesser solvent (water) concentration.
• The solute dissolved in urine is quite high compared to blood. As a result of this, the osmotic pressure of urine is higher as compared to blood.
• Hence, both assertion and reason statements are incorrect.
• (D) If both assertion and reason are false.
• Hence, option D is correct.