Which of the following statements is incorrect:

Options

A. ADH-prevents conversion of angiotensinogen in blood to angiotensin
B. Aldosterone- facilitates water reabosorption
C. ANF-enhances sodium reabsorption
D. Renin - causes vasodilation

Answer

To determine which statement is incorrect, we will analyze each statement provided in the question:

1. **Statement 1**: "ADH prevents conversion of angiotensinogen in blood to angiotensin 2."
- **Analysis**: The Anti-Diuretic Hormone (ADH) primarily regulates water balance in the body by promoting water reabsorption in the kidneys. It does not prevent the conversion of angiotensinogen to angiotensin II; rather, it is involved in the water retention process. Therefore, this statement is incorrect.

2. **Statement 2**: "Aldosterone facilitates water reabsorption."
- **Analysis**: Aldosterone is a hormone produced by the adrenal glands that promotes sodium reabsorption in the kidneys, which indirectly leads to water reabsorption due to osmotic pressure. This statement is correct.

3. **Statement 3**: "ANF enhances sodium reabsorption."
- **Analysis**: The Atrial Natriuretic Factor (ANF) actually promotes the excretion of sodium (natriuresis) and inhibits sodium reabsorption in the kidneys. Therefore, this statement is incorrect.

4. **Statement 4**: "Renin causes vasodilation."
- **Analysis**: Renin is an enzyme that plays a critical role in the renin-angiotensin-aldosterone system (RAAS) and primarily causes vasoconstriction by converting angiotensinogen to angiotensin I, which is further converted to angiotensin II, leading to increased blood pressure. Thus, this statement is also incorrect.

After analyzing all the statements, we can conclude that:

- **Incorrect Statements**:
- Statement 1: "ADH prevents conversion of angiotensinogen in blood to angiotensin 2."
- Statement 3: "ANF enhances sodium reabsorption."
- Statement 4: "Renin causes vasodilation."

The first statement is the most clearly incorrect based on the role of ADH.

### Final Answer:
The incorrect statement is: "ADH prevents conversion of angiotensinogen in blood to angiotensin 2."