Which of the following matching is correct about excretory system in humans ?

Options

A. Glomerular filtration rate : 180 I/day/both kidneys
B. Glomerular filtration rate : 180 I/day/kidney
C. Glomerular filtration rate : The blood filtrate is 100-200 mL /min /kidney
D. Glomerular filtration rate : The blood filtrate is 200-300 mL /min / both kidney

Answer

To determine which matching is correct about the excretory system in humans, we need to analyze the given options regarding the glomerular filtration rate (GFR) and other related aspects.

### Step-by-Step Solution:

1. **Understanding Glomerular Filtration Rate (GFR)**:
- GFR is the volume of filtrate produced by the kidneys per unit time, specifically by the glomeruli of the nephrons.
- It is a crucial indicator of kidney function.

2. **Analyzing the Options**:
- **Option 1**: "Glomerular filtration rate is 180 L per day for both kidneys."
- This option is correct. The average GFR for a healthy adult is approximately 180 liters per day.

- **Option 2**: "Glomerular filtration rate is equal to 180 L per day per kidney."
- This option is incorrect. The 180 L per day refers to both kidneys combined, not per kidney.

- **Option 3**: "Glomerular filtration rate is 100-200 mL per minute per kidney."
- This option is also incorrect. The normal GFR is approximately 125 mL per minute for both kidneys, which translates to about 62.5 mL per minute per kidney.

- **Option 4**: "Glomerular filtration rate is 200 to 300 mL."
- This option is incorrect as it does not accurately reflect the GFR values.

3. **Conclusion**:
- The only correct matching regarding the excretory system in humans is **Option 1**, which states that the glomerular filtration rate is 180 L per day for both kidneys.

### Final Answer:
**The correct matching about the excretory system in humans is Option 1: Glomerular filtration rate is 180 L per day for both kidneys.**