Which hormone possesses anti-insulin effect ?

Options

A. Cortisol
B. Calcitonin
C. Oxytocin
D. Aldosterone

Answer

To determine which hormone possesses an anti-insulin effect, we can follow these steps:

### Step 1: Understand the Function of Insulin
- Insulin is a hormone produced by the beta cells of the pancreas.
- Its primary function is to lower blood glucose levels by promoting the uptake of glucose into cells, stimulating glycogenesis (the formation of glycogen), and inhibiting gluconeogenesis (the formation of glucose from non-carbohydrate sources).

**Hint:** Recall that insulin decreases blood glucose levels and promotes glucose storage.

### Step 2: Identify the Concept of Anti-Insulin Effect
- An anti-insulin effect refers to the action of a hormone that opposes the effects of insulin, typically leading to an increase in blood glucose levels.

**Hint:** Look for hormones that increase blood glucose levels or promote gluconeogenesis.

### Step 3: Analyze the Given Hormones
1. **Cortisol**: A glucocorticoid hormone involved in carbohydrate metabolism. It has an anti-insulin effect by increasing blood glucose levels.
2. **Calcitonin**: Involved in calcium metabolism; it lowers blood calcium levels and does not affect blood glucose.
3. **Oxytocin**: Primarily involved in lactation and childbirth; it does not influence blood glucose levels.
4. **Aldosterone**: Regulates water and salt balance; it does not have a direct effect on blood glucose levels.

**Hint:** Focus on the hormone that is related to carbohydrate metabolism and has a known effect of increasing blood glucose levels.

### Step 4: Conclusion
- Among the hormones listed, **Cortisol** is the one that possesses an anti-insulin effect by increasing blood glucose levels.

**Final Answer:** The hormone that possesses an anti-insulin effect is **Cortisol**.