How many of the following substances given in the list below are secretes by exocrine glands ?
Saliva, oil, digestive, enzymes, thyroxine, FSH, mucus , insulin , earwax.

Options

A. Five
B. Four
C. Six
D. Three

Answer

To determine how many substances from the provided list are secreted by exocrine glands, we need to identify which of these substances are produced by exocrine glands and which are produced by endocrine glands.

### Step-by-Step Solution:

1. **Understand Exocrine Glands**: Exocrine glands are glands that secrete their products into ducts that lead to the external environment or into body cavities. Examples include salivary glands, sebaceous glands, and sweat glands.

2. **List of Substances**: The substances provided are:
- Saliva
- Oil
- Digestive enzymes
- Thyroxine
- FSH (Follicle Stimulating Hormone)
- Mucus
- Insulin
- Earwax

3. **Identify Exocrine Substances**:
- **Saliva**: Secreted by salivary glands (exocrine).
- **Oil**: Secreted by sebaceous glands (exocrine).
- **Digestive enzymes**: Secreted by the pancreas (exocrine).
- **Thyroxine**: Secreted by the thyroid gland (endocrine).
- **FSH**: Secreted by the anterior pituitary (endocrine).
- **Mucus**: Secreted by mucus glands (exocrine).
- **Insulin**: Secreted by the pancreas (endocrine).
- **Earwax**: Secreted by ceruminous glands (exocrine).

4. **Count the Exocrine Substances**:
- Saliva (exocrine)
- Oil (exocrine)
- Digestive enzymes (exocrine)
- Mucus (exocrine)
- Earwax (exocrine)

5. **Total Count**: The substances that are secreted by exocrine glands are:
- Saliva
- Oil
- Digestive enzymes
- Mucus
- Earwax

Thus, there are **5 substances** that are secreted by exocrine glands.

### Final Answer: 5

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