Enzyme trypsinogen is changed to trypsin by-

Options

A. Gastrin
B. Enterogastrone
C. Enterokinase
D. Secretin

Answer

To solve the question "Enzyme trypsinogen is changed to trypsin by-", we can follow these steps:

### Step 1: Understand the context of the question
- Trypsinogen is an inactive precursor (zymogen) of the enzyme trypsin, which is involved in protein digestion.

### Step 2: Identify the conversion process
- The conversion of trypsinogen to trypsin is crucial for the digestion of proteins in the small intestine.

### Step 3: Analyze the options provided
- The question provides several options, and we need to determine which one is responsible for the conversion of trypsinogen to trypsin.

### Step 4: Evaluate each option
1. **Gastrin**: This is a hormone that stimulates gastric juice secretion but does not convert trypsinogen to trypsin.
2. **Enterogastron**: This hormone inhibits gastric activities and is not involved in the conversion of trypsinogen.
3. **Enterokinase**: This is an enzyme secreted by the intestinal glands that activates trypsinogen into trypsin.
4. **Secretin**: This hormone regulates water homeostasis and is not involved in the conversion of trypsinogen.

### Step 5: Conclude the correct answer
- The correct answer is **Enterokinase**, as it is responsible for converting trypsinogen into trypsin.

### Final Answer:
Enzyme trypsinogen is changed to trypsin by **Enterokinase**.

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