The Question is from neet-zoology excretory-products-and-their-elimination human-excretory-system, and it was created by the author K SUNKANNA

Question

Glomerular filtration rate (GFR) is a measure of:

K SUNKANNA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
	**Primary Concept**: Renal Physiology
	**Related Topics**: Glomerular filtration, Kidney function, Urine formation
	**Prerequisites**: Understanding of the nephron structure and function.
## SOLUTION PATHWAY
**Given Information**:
	The question asks for the definition of Glomerular Filtration Rate (GFR).
	Options describe different aspects of kidney function.
**Method & Steps**:
	1. Understand the function of the glomerulus in the nephron.
		Reasoning: The glomerulus is a network of capillaries within Bowman's capsule.  Its primary function is filtration of blood.
		Formula/Rule:  GFR is not directly calculated with a single formula, but rather estimated using various methods like creatinine clearance.
	2. Analyze the options based on the glomerulus's role.
		Working: Option A refers to renal blood flow. Option B refers to urine output. Option C accurately describes the amount of filtrate formed. Option D refers to urine concentration.
		Key Point: GFR specifically refers to the rate of filtrate formation, not the amount of urine produced (which is affected by reabsorption and secretion).
	3. Select the option that accurately defines GFR.
		Result: The correct answer is C: The amount of filtrate formed by the kidneys per minute.
		Verification: The definition aligns with the physiological function of the glomerulus in filtering blood to produce filtrate.
## OPTION ANALYSIS
A :x: The amount of blood passing through the kidneys per minute is renal blood flow, not GFR.  GFR is a subset of renal blood flow.
B :x: The amount of urine produced per minute is urinary output, which is influenced by GFR, but also reabsorption and secretion in the tubules.
C ✓: The amount of filtrate formed by the kidneys per minute accurately defines GFR.
D :x: The concentration of urine is related to the reabsorption and secretion processes in the tubules, not the initial filtration rate in the glomerulus.
## LEARNING AIDS
	**Common Mistakes**:
		1.Confusing GFR with renal blood flow or urine output: Understanding the distinct roles of each process is crucial.
			How to avoid:  Focus on the specific function of the glomerulus as a filtration unit.
		2. Failing to understand the relationship between GFR and urine production:  Urine production is a downstream consequence of GFR, reabsorption, and secretion.
			How to avoid:  Visualize the nephron's structure and the processes occurring in each segment.
	**Quick Tips**:
		1. Remember GFR measures the rate of *filtration* at the glomerulus.
		2. Use mnemonics or diagrams to understand the nephron's functions and the relationship between GFR, reabsorption, secretion, and urine production.

K SUNKANNA · Answer

The amount of blood passing through the kidneys per minute

K SUNKANNA · Answer

The amount of urine produced per minute

K SUNKANNA · Answer

The correct Option is "The amount of filtrate formed by the kidneys per minute"

K SUNKANNA · Answer

The concentration of urine

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