Which of the following is CORRECT regarding Chemosensitive area ?

Options

A. It is located in the medulla region .
B. It is highly sensitive to `O_2`
C. High `H^+` concentration activates the rhthm centre
D. Both (A) and (C)

Answer

To solve the question regarding the chemosensitive area, we will evaluate each of the provided options step by step.

### Step 1: Analyze Option A
**Statement:** "It is located in the medulla region."
- The chemosensitive area is indeed located in the medulla oblongata, which is part of the brainstem. This statement is **correct**.

### Step 2: Analyze Option B
**Statement:** "It is highly sensitive to oxygen."
- This statement is **incorrect**. The chemosensitive area is primarily sensitive to carbon dioxide (CO2) and hydrogen ions (H+), not oxygen.

### Step 3: Analyze Option C
**Statement:** "High Hydrogen Ion Concentration activates the Rhyme Center."
- This statement is **correct**. An increase in hydrogen ion concentration (which corresponds with increased CO2 levels) stimulates the chemosensitive area, leading to activation of the respiratory centers to adjust breathing.

### Step 4: Analyze Option D
**Statement:** "Both A and C."
- Since both Option A and Option C are correct, this statement is also **correct**.

### Conclusion
Based on the analysis:
- Option A is correct.
- Option B is incorrect.
- Option C is correct.
- Option D is correct because it includes both A and C.

Thus, the correct answer is **Option D: Both A and C**.

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