Which of the following hormones increase alertness, piloerection and sweating?

Options

A. TCT
B. Catecholamines
C. Cortisol
D. Thymosins

Answer

To answer the question "Which of the following hormones increase alertness, piloerection, and sweating?" we need to analyze the options provided: TCT, catecholamines, cortisol, and thymosine.

### Step-by-Step Solution:

1. **Understanding the Hormones**:
- **TCT (Thyrocalcitonin)**: This hormone is involved in calcium metabolism and does not play a role in alertness or sweating.
- **Catecholamines**: This group includes hormones like adrenaline (epinephrine) and norepinephrine. They are released by the adrenal medulla during stressful situations and are known to increase alertness, cause piloerection (the raising of hair), and stimulate sweating.
- **Cortisol**: This is a steroid hormone produced by the adrenal cortex, primarily involved in stress response and metabolism regulation, but it does not directly increase alertness or cause piloerection and sweating.
- **Thymosine**: This hormone is related to the immune system and does not influence alertness, piloerection, or sweating.

2. **Identifying the Correct Answer**:
- Since catecholamines (adrenaline and norepinephrine) are responsible for increasing alertness, causing piloerection, and stimulating sweating, they are the correct choice.

3. **Final Answer**:
- The hormone that increases alertness, piloerection, and sweating is **Catecholamines**.