Select the incorrect statement about MALT.

Options

A. It constitutes about 20% of lymphoid tissue in human body.
B. It doesn't produces enzymes .
C. it stands for Mucosa Associated Lymphoid Tissue.
D. It is present in respiratory tract .

Answer

To solve the question regarding MALT (Mucosa Associated Lymphoid Tissue) and identify the incorrect statement, we can follow these steps:

### Step 1: Understand what MALT is
MALT stands for Mucosa Associated Lymphoid Tissue. It is a component of the immune system that is associated with mucosal surfaces in the body.

**Hint:** Remember that MALT is related to mucosal tissues and plays a role in the immune response.

### Step 2: Analyze the statements
We are given four statements about MALT. Let's analyze each one:

1. **"It constitutes about 20% of lymphoid tissue in the human body."**
- This statement is incorrect. MALT actually constitutes about 50% of the lymphoid tissue in the human body.

2. **"It does not produce enzymes."**
- This statement is correct. MALT does not produce enzymes; its primary function is related to immune responses.

3. **"It stands for mucosa associated lymphoid tissue."**
- This statement is correct. MALT is indeed an abbreviation for mucosa associated lymphoid tissue.

4. **"It is present in the respiratory tract."**
- This statement is also correct. MALT is found in various mucosal areas, including the respiratory tract.

### Step 3: Identify the incorrect statement
From the analysis above, the first statement is the incorrect one because it misstates the percentage of lymphoid tissue that MALT constitutes in the human body.

**Final Answer:** The incorrect statement about MALT is: "It constitutes about 20% of lymphoid tissue in the human body."