Which of the following hormone is attributed to the dilation of pupillary dilatation , increased oxygen consumption and glucogenolysis?

Options

A. ACTH
B. Insulin
C. Adrenaline
D. Glucagon

Explanation

To solve the question regarding which hormone is responsible for pupillary dilation, increased oxygen consumption, and glycogenolysis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Functions of the Hormones**:
- We need to identify the functions associated with the hormones listed in the options. The functions we are looking for are pupillary dilation, increased oxygen consumption, and glycogenolysis (the breakdown of glycogen to glucose).

2. **Identify Hormones Related to Stress Response**:
- Pupillary dilation and increased oxygen consumption are typically associated with the body’s response to stress or emergency situations. This is often referred to as the "fight or flight" response.

3. **Consider the Role of Adrenaline**:
- The hormone that is primarily responsible for the "fight or flight" response is adrenaline (also known as epinephrine). It is secreted by the adrenal medulla and leads to various physiological changes, including:
- Dilation of pupils (to enhance vision).
- Increased heart rate and oxygen consumption (to prepare the body for rapid action).
- Glycogenolysis (to increase blood glucose levels for energy).

4. **Eliminate Other Hormones**:
- Other hormones mentioned, such as insulin and glucagon, are primarily involved in regulating blood glucose levels but do not directly cause pupillary dilation or increased oxygen consumption.
- Adrenocorticotropic hormone (ACTH) stimulates the adrenal cortex but does not have the same immediate effects as adrenaline.

5. **Conclude the Answer**:
- Based on the above analysis, the hormone that is attributed to pupillary dilation, increased oxygen consumption, and glycogenolysis is **adrenaline**.

### Final Answer:
The hormone attributed to pupillary dilation, increased oxygen consumption, and glycogenolysis is **adrenaline** (epinephrine).

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