Sea gulls excrete excess of NaCl from

Options

A. Liver
B. Lungs
C. Urine
D. Nasal gland

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where sea gulls excrete excess sodium chloride (NaCl). This requires knowledge of the physiological adaptations of sea gulls to their saline environment.

2. **Identifying the Options**: The options provided are liver, lungs, urine, and nasal gland. We need to analyze each option to determine which one is responsible for the excretion of excess NaCl in sea gulls.

3. **Researching Sea Gulls' Adaptations**: Sea gulls, like other seabirds, have specialized adaptations to cope with the high salt content in their diet, primarily from seawater and marine food sources.

4. **Identifying the Correct Excretory Organ**: Sea gulls possess salt glands located in the shallow depressions above their eye sockets. These glands are specifically adapted to excrete excess salt.

5. **Mechanism of Excretion**: The salt glands filter out excess sodium chloride from the bloodstream. The concentrated salt solution produced is then expelled through ducts into the nasal cavity.

6. **Final Excretion Process**: The excess salt is eliminated from the body in liquid form through the nostrils, often accompanied by head shaking or sneezing.

7. **Conclusion**: Based on the information gathered, the correct answer to the question is that sea gulls excrete excess NaCl from the nasal gland.

**Final Answer**: Sea gulls excrete excess NaCl from the **nasal gland**.

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