Ptyalin is an enzyme of

Options

A. Salivary juice
B. Pancreatic juice
C. Intestinal juice
D. None of these

Answer

**Step-by-Step Solution:**

1. **Identify the Enzyme**: The enzyme in question is ptyalin.

2. **Determine the Source**: Ptyalin is also known as salivary amylase, which indicates that it is found in saliva.

3. **Function of Ptyalin**: The primary function of ptyalin is to catalyze the breakdown of starch into simpler sugars, such as maltose and limit dextrin.

4. **Activation of Ptyalin**: Ptyalin is activated by chloride ions present in saliva, converting it from its inactive form to its active form.

5. **Source of Secretion**: Ptyalin is secreted by the parotid gland, which is one of the three pairs of salivary glands in the human mouth.

6. **Conclusion**: Since ptyalin is a component of saliva, the correct answer to the question is that ptyalin is an enzyme of salivary juice.

**Final Answer**: Ptyalin is an enzyme of salivary juice.

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