Question

In humans, the total amount of urine excreted per day is about

• A. 2.5 - 3.0 litres
• B. 3.0 - 4.0 litres
• C. 0.5 - 1.0 litres
• D. 1.6 1.8 litres

Answer 1

The Correct Option is D

To solve the problem, we need to determine the total amount of urine excreted by humans per day. This involves understanding the normal range of daily urine output in healthy individuals.

1. Understanding Urine Production:
In humans, the kidneys filter blood and produce urine as a way to eliminate waste products and regulate water and electrolyte balance. The amount of urine produced depends on factors such as fluid intake, diet, physical activity, and overall health.

2. Normal Range of Daily Urine Output:
Under normal conditions, the average adult human excretes approximately 1.6 to 1.8 liters of urine per day. This range is considered within the healthy limits for most individuals.

3. Factors Affecting Urine Output:
- Fluid Intake: Higher fluid intake leads to increased urine production.
- Diet: Consuming foods high in salt or protein can increase urine output due to the need to excrete excess nitrogenous wastes.
- Physical Activity: Increased sweating during exercise reduces urine output because more water is lost through perspiration.

4. Analyzing the Options:
(A) 2.5 - 3.0 liters: This range is higher than the normal daily urine output and may indicate excessive fluid intake or medical conditions like diabetes insipidus.
(B) 3.0 - 4.0 liters: This range is significantly higher and is not typical for healthy individuals under normal circumstances.
(C) 0.5 - 1.0 liter: This range is lower than the normal daily urine output and may indicate dehydration or kidney dysfunction.
(D) 1.6 - 1.8 liters: This range matches the normal daily urine output for healthy adults.

Final Answer:
The total amount of urine excreted per day in humans is about 1.6 - 1.8 liters.

Correct Option: (D) 1.6 - 1.8 liters