Select the correct matching pair of a hormone alongwith its source and function

Options

A. 1
B. 2
C. 3
D. 4

Answer

To solve the question of selecting the correct matching pair of a hormone along with its source and function, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Hormones**: We have four hormones to analyze: Prolactin, Vasopressin, Norepinephrine, and Glucagon.

2. **Analyze Prolactin**:
- **Source**: Prolactin is produced by the anterior pituitary gland.
- **Function**: Its primary function is to stimulate milk production in mammals.
- **Given Information**: The source is mentioned as posterior pituitary, which is incorrect. Therefore, this option is eliminated.

3. **Analyze Vasopressin**:
- **Source**: Vasopressin (also known as Antidiuretic Hormone or ADH) is secreted from the posterior pituitary gland.
- **Function**: Its main functions include retaining water in the body and constricting blood vessels.
- **Given Information**: The function is stated as increasing loss of water through urine, which is incorrect. Thus, this option is also eliminated.

4. **Analyze Norepinephrine**:
- **Source**: Norepinephrine is released from the adrenal medulla.
- **Function**: It increases heart rate, enhances blood flow to muscles, and is involved in the fight-or-flight response.
- **Given Information**: The source is correctly identified as adrenal medulla, and the function includes increasing heart rate, which is correct. Therefore, this option is a potential match.

5. **Analyze Glucagon**:
- **Source**: Glucagon is produced by the alpha cells of the pancreas.
- **Function**: It raises blood glucose levels by promoting the conversion of glycogen to glucose in the liver.
- **Given Information**: The source is mentioned as beta cells of the islets of Langerhans, which is incorrect since beta cells produce insulin. Hence, this option is eliminated.

6. **Conclusion**: After analyzing all the options, the correct matching pair is:
- **Norepinephrine**: Source - Adrenal Medulla; Function - Increases heart rate, respiration, and alertness.

### Final Answer:
The correct matching pair of a hormone along with its source and function is **Norepinephrine - Adrenal Medulla - Increases heart rate, respiration, and alertness**.

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