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DPP for NEET: Daily Practice Problems, Ch: Excretory Products and their Elimination
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FAQs on DPP for NEET: Daily Practice Problems, Ch: Excretory Products and their Elimination
| 1. What are excretory products and why is their elimination important? |  |
Ans. Excretory products are waste substances produced by metabolic activities in the body. They include urea, carbon dioxide, water, and other waste products. The elimination of these substances is crucial for maintaining homeostasis and preventing the buildup of toxic substances in the body. The excretory system, which includes organs like the kidneys, lungs, and skin, helps in eliminating these waste products efficiently.
| 2. How do the kidneys contribute to the elimination of excretory products? | |
Ans. The kidneys play a vital role in eliminating excretory products from the body. They filter the blood and remove waste products like urea, excess water, and electrolytes, which are then excreted as urine. The kidneys also help in maintaining the balance of various substances in the body, such as sodium, potassium, and pH levels. Overall, the kidneys ensure the proper elimination of waste products and maintain the body's internal environment.
| 3. What is the role of the liver in the elimination of excretory products? | |
Ans. The liver is involved in the elimination of various excretory products. It plays a crucial role in the metabolism of nitrogenous waste, converting ammonia into urea, which is less toxic and easily excreted by the kidneys. The liver also helps in the elimination of bilirubin, a waste product of red blood cell breakdown, through the bile. Additionally, the liver detoxifies harmful substances, drugs, and toxins, aiding in their elimination from the body.
| 4. How does the respiratory system contribute to the elimination of excretory products? | |
Ans. The respiratory system plays a significant role in the elimination of excretory products, particularly carbon dioxide. During cellular respiration, carbon dioxide is produced as a waste product. The respiratory system, primarily the lungs, removes carbon dioxide from the body by exhaling it during the process of breathing. This exchange of gases ensures the elimination of carbon dioxide, thereby maintaining the balance of respiratory and excretory processes in the body.
| 5. How does the skin contribute to the elimination of excretory products? | |
Ans. The skin, being the largest organ of the body, also contributes to the elimination of excretory products. Through the process of sweating, the skin excretes water, salt, and small amounts of urea. Sweating helps in regulating body temperature and eliminating waste products from the body. The excretion of these substances through the skin is especially important during physical exertion or exposure to high temperatures, as it helps in maintaining homeostasis and preventing the buildup of waste products.
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Apr 18, 2026 Last updated
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