To solve the question regarding ammonia, urea, uric acid, carbon dioxide, water, and ions like Na+, K+, Cl-, phosphate, sulfate, etc., we need to categorize these substances based on their roles in biological processes.
### Step-by-Step Solution:
1. **Identify the substances**: The substances mentioned are ammonia, urea, uric acid, carbon dioxide, water, and various ions (Na+, K+, Cl-, phosphate, sulfate).
2. **Define Excretory Substances**: Excretory substances are waste products that are not utilized by the body and need to be eliminated to maintain homeostasis. Examples include ammonia, urea, uric acid, carbon dioxide, and excess water.
3. **Identify Metabolic Products**: Metabolic products are substances formed as a result of metabolic processes (catabolism and anabolism). Ammonia, urea, uric acid, and carbon dioxide are all products of metabolic reactions.
4. **Determine Respiratory Substances**: Respiratory substances are primarily involved in respiration. Carbon dioxide and water are by-products of cellular respiration, while ammonia, urea, and uric acid are not classified as respiratory products.
5. **Analyze the Options**:
- **Excretory Substance**: Yes, ammonia, urea, uric acid, carbon dioxide, and water are excretory substances.
- **Metabolic Product**: Yes, all of these substances are metabolic products.
- **Respiratory Substance**: Only carbon dioxide and water fit this category; ammonia, urea, and uric acid do not.
- **Both Excretory and Metabolic**: Yes, ammonia, urea, uric acid, carbon dioxide, and water are both excretory and metabolic products.
6. **Conclusion**: The correct classification of the substances is that they are primarily excretory substances and metabolic products, but not all are respiratory substances.
### Final Answer:
Ammonia, urea, uric acid, carbon dioxide, water, and ions like Na+, K+, Cl-, phosphate, sulfate, etc., are classified as both excretory substances and metabolic products.
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