When a person is suffering from poor renal absorption which one of the following factor will not help in maintenance of blood volume ?

Options

A. Decreased glomerular filtration
B. Increased ADH secretion
C. Decreased arterial pressure in kidney
D. Increased arterial pressure in kidney

Answer

To solve the question regarding which factor will not help in the maintenance of blood volume when a person is suffering from poor renal absorption, we can analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Poor Renal Absorption**:
- Poor renal absorption means that the kidneys are not effectively reabsorbing water and other substances from the filtrate back into the blood. This can lead to a decrease in blood volume.

2. **Analyzing Each Option**:
- **Option 1: Decreased Glomerular Filtration Rate (GFR)**:
- A decreased GFR means that less filtrate is being produced, which can help in conserving blood volume by reducing the amount of fluid that is lost. Therefore, this option helps maintain blood volume.

- **Option 2: Increased ADH Secretion**:
- Antidiuretic hormone (ADH) promotes water reabsorption in the kidneys. Increased ADH secretion would lead to more water being reabsorbed back into the bloodstream, which helps maintain blood volume. Hence, this option also helps maintain blood volume.

- **Option 3: Decreased Atrial Pressure in Kidney**:
- Decreased atrial pressure can activate the juxtaglomerular apparatus, leading to the release of renin. This triggers the renin-angiotensin-aldosterone system (RAAS), which increases renal absorption and helps maintain blood volume. Thus, this option is also beneficial for maintaining blood volume.

- **Option 4: Increased Atrial Pressure in Kidney**:
- Increased atrial pressure would inhibit the renin-angiotensin mechanism. This means that the kidneys would not reabsorb as much filtrate, leading to a decrease in blood volume. Therefore, this option does not help in maintaining blood volume.

3. **Conclusion**:
- The factor that will not help in the maintenance of blood volume when a person is suffering from poor renal absorption is **increased atrial pressure in the kidney**.

### Final Answer:
**Increased atrial pressure in the kidney will not help in the maintenance of blood volume.**

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