Choose the wrong statement among the following about the enzymatic and other secretions

Options

A. Trypsinogen is activated by enterokinase
B. Optimum pH for salivary amylase is 8.9
C. Rennin helps in digestion of milk protiens
D. Goblet cells secrete mucus

Answer

To solve the question of identifying the wrong statement about enzymatic and other secretions, we can analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze the First Statement**:
- The first statement claims that "trypsinogen is activated by the enterokinase."
- Trypsinogen is indeed a precursor enzyme (zymogen) secreted by the pancreas and is activated in the small intestine by the enzyme enterokinase. This statement is **true**.

2. **Analyze the Second Statement**:
- The second statement states that "the optimum pH for salivary amylase is 8.9."
- The optimum pH for salivary amylase is actually around 6.8, which is slightly acidic. Therefore, this statement is **false**.

3. **Analyze the Third Statement**:
- The third statement claims that "renin helps in digestion of milk proteins."
- Renin is an enzyme that curdles milk and is particularly important in infants for digesting milk proteins. This statement is **true**.

4. **Analyze the Fourth Statement**:
- The fourth statement states that "goblet cells secrete mucus."
- Goblet cells are specialized cells found in the gastrointestinal tract that secrete mucus, aiding in lubrication and protection of the intestinal lining. This statement is **true**.

5. **Conclusion**:
- The only statement that is incorrect is the second one regarding the optimum pH for salivary amylase. Thus, the answer to the question is that the wrong statement is the second one.

### Final Answer:
The wrong statement among the given options is that "the optimum pH for salivary amylase is 8.9."

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