Which one exclusively comprises endocrine glands

Options

A. Pituitary, Salivary, Adrenals, Ovary, Testis
B. Pituitary, Thyroid, Adrenals, Ovary, Testis
C. Salivary, Thyroid, Adrenals, Ovary, Testis
D. Adrenals, Ovary, Testis, Salivary, Liver.

Answer

To determine which option exclusively comprises endocrine glands, we need to analyze the glands mentioned in the options and classify them as either endocrine or exocrine.

### Step-by-Step Solution:

1. **Understanding Endocrine Glands**:
- Endocrine glands are ductless glands that secrete hormones directly into the bloodstream. These hormones regulate various bodily functions.

2. **Identifying the Glands**:
- The options provided are:
- **Pituitary**
- **Salivary**
- **Adrenal**
- **Ovary**
- **Testis**
- **Thyroid**
- **Liver**

3. **Classifying Each Gland**:
- **Pituitary Gland**: An endocrine gland known as the "master gland" that regulates other endocrine glands.
- **Salivary Gland**: An exocrine gland that secretes saliva through ducts; therefore, it is not an endocrine gland.
- **Adrenal Gland**: An endocrine gland that secretes hormones like adrenaline and cortisol.
- **Ovary**: An endocrine gland that produces hormones such as estrogen and progesterone.
- **Testis**: An endocrine gland that produces testosterone.
- **Thyroid Gland**: An endocrine gland that secretes thyroid hormones, which regulate metabolism.
- **Liver**: Primarily functions as an organ for metabolism and detoxification, but it also has some endocrine functions; however, it is not exclusively an endocrine gland.

4. **Finding the Exclusive Endocrine Glands**:
- The glands that are exclusively endocrine in the provided options are:
- Pituitary
- Adrenal
- Ovary
- Testis
- Thyroid

5. **Identifying the Correct Option**:
- The option that exclusively comprises endocrine glands is:
- **Pituitary, Thyroid, Adrenal, Ovary, Testis** (Option 2)

### Conclusion:
The correct answer is **Option 2: Pituitary, Thyroid, Adrenal, Ovary, Testis** as these are all endocrine glands.

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