All the following are characterized by hypothyroidism , except

Options

A. weight gain
B. bradycardia
C. heat intolerance
D. decreased metabolic rate

Answer

To solve the question "All the following are characterized by hypothyroidism, except," we need to analyze the characteristics associated with hypothyroidism and identify the exception among the options provided.

### Step-by-Step Solution:

1. **Understand Hypothyroidism**:
- Hypothyroidism is a condition where the thyroid gland does not produce sufficient amounts of thyroid hormones (primarily T3 and T4). This leads to a decrease in the basal metabolic rate.

2. **Identify Common Symptoms of Hypothyroidism**:
- **Weight Gain**: Due to a decreased metabolic rate, individuals with hypothyroidism often experience weight gain.
- **Bradycardia**: This refers to a slower than normal heart rate. Hypothyroidism can lead to bradycardia because of the reduced metabolic activity.
- **Decreased Metabolic Rate**: A hallmark of hypothyroidism is a lower metabolic rate, which affects energy levels and weight.
- **Heat Intolerance**: Typically, individuals with hypothyroidism experience cold intolerance rather than heat intolerance. This is because they are unable to generate enough metabolic heat due to low hormone levels.

3. **Analyze the Options**:
- If the options include weight gain, bradycardia, decreased metabolic rate, and heat intolerance, we can conclude:
- Weight gain: Characteristic of hypothyroidism.
- Bradycardia: Characteristic of hypothyroidism.
- Decreased metabolic rate: Characteristic of hypothyroidism.
- Heat intolerance: NOT characteristic of hypothyroidism (instead, they usually experience cold intolerance).

4. **Conclusion**:
- The option that is NOT characterized by hypothyroidism is **heat intolerance**.

### Final Answer:
The correct option is **heat intolerance**.

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