Which is false

Options

A. Nephron-Excretion
B. Alveoli-Respiration
C. Kidney-osmoregulation
D. None of these

Answer

To determine which statement is false among the options provided, we will analyze each option step by step.

### Step 1: Analyze the first option - Nephron
- The nephron is the structural and functional unit of the kidney.
- It is responsible for the excretion of waste products from the blood and the regulation of water and electrolytes.
- **Conclusion**: This statement is true.

**Hint**: Remember that the nephron plays a crucial role in filtering blood and forming urine.

### Step 2: Analyze the second option - Alveoli
- Alveoli are the structural and functional units of the lungs.
- They are involved in the exchange of gases (oxygen and carbon dioxide) during respiration.
- **Conclusion**: This statement is also true.

**Hint**: Think about how oxygen enters the blood and carbon dioxide is expelled through the alveoli.

### Step 3: Analyze the third option - Kidney and Osmoregulation
- The kidney is indeed involved in osmoregulation, which is the process of maintaining the body's water balance and electrolyte levels.
- However, osmoregulation is not the same as regulating body temperature; it refers to the regulation of water and solute concentrations in the body.
- **Conclusion**: This statement is misleading because it incorrectly equates osmoregulation with temperature regulation.

**Hint**: Differentiate between osmoregulation (water and solute balance) and thermoregulation (temperature control).

### Step 4: Analyze the last option - None of these
- The last option states that none of the previous statements are false.
- Since we identified that the statement regarding osmoregulation is misleading, this option cannot be correct.
- **Conclusion**: This option is false.

### Final Conclusion
- The false statement is related to the kidney's role in osmoregulation, as it incorrectly describes osmoregulation as the ability to regulate body temperature.

**Final Answer**: The false statement is regarding the kidney and osmoregulation.