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The normal range of urinary output per day in human adults is-
A. 50 ml
B. 10 ml
C. 400- 2000 ml
D. 200 ml

Answer
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Hint: The process of eliminating metabolic waste from an organism is known as excretion. This process is primarily carried by skin, lungs, and kidneys in vertebrates. And their main excretory products are uric acid, ammonia, carbon dioxide, creatine, and guanine.

Complete answer:
In humans and many different organisms, urine is a liquid by-product produced as a result of metabolism. The flow of urine starts from the kidney, via the ureters and then in the urinary bladder. The process of excretion of urine by the urethra is termed as urination. The range of urinary output depends on several factors such as the health of the person, weight, level of activity, environmental factors, and state of hydration.

The condition in which excess of urine is produced is termed as polyuria. In this condition, the person urinates more than 2.5 liters per day. The condition in which a person urinates less than 400 ml is termed as oliguria. The condition in which the production of urine is very scarce that is less than even 100 ml per day is known as anuria.

From the above it can be concluded that the normal range of urinary output per day in human adults is 400-2000ml per day. Therefore, option [C] is correct.

Hence, the correct answer is option (C).

Note: Urine plays an important role in nitrogen cycle on the earth. It fertilizes the soil and thus, helping the plant to grow. Many years ago, fermented or aged urine was used for the production of gunpowder, dyeing in textile industries, tanning of leather and cleaning households.