Aldosterone is secreted by:

Options

A. Zona glomerulosa
B. Zona fasciculata
C. Zona reticularis
D. Zona pellucida

Answer

**Step-by-Step Solution:**

1. **Identify the Hormone**: The question asks about the secretion of Aldosterone, which is a type of hormone.

2. **Classify the Hormone**: Aldosterone is classified as a mineralocorticoid. This classification helps in understanding its function and origin.

3. **Locate the Source**: Aldosterone is secreted by the adrenal glands, which are located on top of each kidney.

4. **Understand the Structure of the Adrenal Gland**: The adrenal gland consists of two main parts: the outer cortex and the inner medulla. The cortex is further divided into three layers.

5. **Identify the Layers of the Cortex**: The three layers of the adrenal cortex are:
- Zona Glomerulosa
- Zona Fasciculata
- Zona Reticularis

6. **Determine the Specific Layer for Aldosterone Secretion**: Aldosterone is specifically secreted by the Zona Glomerulosa, which is the outermost layer of the adrenal cortex.

7. **Conclude the Answer**: Therefore, the correct answer to the question "Aldosterone is secreted by:" is the Zona Glomerulosa.

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