Which set of organs is designated as heterocrine glands?

Options

A. Gonads and Pancreas
B. Thymus and pituitary
C. Parathyroid and Thyroid
D. Lungs and stomach

Answer

To solve the question "Which set of organs is designated as heterocrine glands?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Heterocrine Glands**:
- Heterocrine glands are those that have both endocrine and exocrine functions. This means they secrete hormones directly into the bloodstream (endocrine) and also release substances through ducts (exocrine).

2. **Identify the Options Given**:
- Option 1: Gonads and pancreas
- Option 2: Thymus and pituitary
- Option 3: Parathyroid and thyroid
- Option 4: Lungs and stomach

3. **Analyze Each Option**:
- **Option 1 (Gonads and pancreas)**:
- Gonads (testes and ovaries) produce hormones (endocrine) and also produce gametes (sperm and eggs) which are released (exocrine).
- The pancreas produces insulin and glucagon (endocrine) and also secretes digestive enzymes (exocrine).
- This option fits the definition of heterocrine glands.

- **Option 2 (Thymus and pituitary)**:
- Both are purely endocrine glands as they secrete hormones directly into the bloodstream.

- **Option 3 (Parathyroid and thyroid)**:
- Both are also purely endocrine glands, involved in hormone secretion without ducts.

- **Option 4 (Lungs and stomach)**:
- The lungs are primarily involved in gas exchange (not a gland), and the stomach secretes digestive juices (exocrine) but does not have an endocrine function.

4. **Conclusion**:
- The only option that includes organs with both endocrine and exocrine functions is **Option 1: Gonads and pancreas**.

### Final Answer:
The set of organs designated as heterocrine glands is **Gonads and pancreas**.

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