Homeostasis is disturbed when

Options

A. It is cold outside
B. It is hot outside
C. We fall ill
D. We perform strenuous exercise

Answer

**Step-by-Step Solution:**

1. **Understanding Homeostasis:**
- Homeostasis is the ability of an organism to maintain a stable internal environment despite changes in external conditions. This includes regulating body temperature, pH levels, fluid balance, and blood sugar levels.

2. **Analyzing the Options:**
- The question provides four scenarios that could potentially disturb homeostasis:
- A. It is cold outside.
- B. It is hot outside.
- C. We fall ill.
- D. We perform strenuous exercises.

3. **Evaluating Each Option:**
- **Option A: It is cold outside.**
- In cold conditions, warm-blooded animals (like humans) maintain a constant internal body temperature. Thus, this does not disturb homeostasis.

- **Option B: It is hot outside.**
- Similarly, in hot conditions, warm-blooded animals can regulate their internal temperature through mechanisms like sweating. Therefore, this does not disturb homeostasis either.

- **Option C: We fall ill.**
- Falling ill often introduces pathogens or infections that can disrupt normal bodily functions. This can lead to fever or other symptoms, causing the body to struggle to maintain homeostasis. Thus, this option does disturb homeostasis.

- **Option D: We perform strenuous exercises.**
- While strenuous exercise increases metabolic demands and can temporarily alter body conditions (like increased heart rate and temperature), the body has mechanisms (like sweating and increased respiration) to compensate for these changes. Therefore, normal strenuous exercise does not significantly disturb homeostasis unless it is prolonged.

4. **Conclusion:**
- Based on the analysis, the correct answer is **C. We fall ill**, as this is the scenario that most directly disrupts the body's ability to maintain homeostasis.

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