Which of the following statemetns is incorrect

Options

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

Answer

To determine which of the statements is incorrect, we will analyze each statement one by one:

1. **ADH prevents conversion of angiotensinogen in blood to angiotensin.**
- This statement is incorrect. Antidiuretic hormone (ADH) does not prevent the conversion of angiotensinogen to angiotensin. In fact, ADH plays a role in increasing blood volume and pressure, which can indirectly support the conversion process. The conversion of angiotensinogen to angiotensin is primarily facilitated by renin, which is released when there is a decrease in blood flow to the kidneys.

2. **Aldosterone facilitates water reabsorption.**
- This statement is correct. Aldosterone is a hormone that promotes the reabsorption of sodium in the kidneys, which in turn leads to water reabsorption due to osmotic gradients. This helps to increase blood volume and blood pressure.

3. **ANF enhances sodium reabsorption.**
- This statement is incorrect. Atrial Natriuretic Factor (ANF) actually promotes the excretion of sodium by the kidneys, which leads to a decrease in blood volume and pressure. Therefore, it does not enhance sodium reabsorption.

4. **Renin causes vasodilation.**
- This statement is also incorrect. Renin is an enzyme that initiates the renin-angiotensin-aldosterone system (RAAS), leading to vasoconstriction and an increase in blood pressure. It does not cause vasodilation.

After analyzing all statements, the incorrect statements are:
- **Statement 1**: ADH prevents conversion of angiotensinogen in blood to angiotensin (Incorrect)
- **Statement 3**: ANF enhances sodium reabsorption (Incorrect)
- **Statement 4**: Renin causes vasodilation (Incorrect)

Thus, the statement that is incorrect is **Statement 1**.