The amount of plasma entering into Bowman's capsule per minute is called:

Appeared in: RIMS Nursing Officer - 2022

Explanation

The Glomerular Filtration Rate (GFR) is the precise term for the volume of filtrate produced by both kidneys per minute.
This process involves the movement of water and small solutes from the blood in the glomerular capillaries into the Bowman's capsule.
The normal GFR in a healthy adult is approximately 125 mL/minute, which amounts to about 180 liters per day.
GFR is the primary indicator of kidney function.

Option B: Renal Plasma Flow (RPF) refers to the total volume of plasma that passes through the kidneys per minute, not just the portion that is filtered. GFR is only a fraction (about 20%) of the RPF.
Option C: Renal Blood Flow (RBF) is the total volume of blood (including red blood cells, white blood cells, and platelets, in addition to plasma) that passes through the kidneys per minute. It is a larger volume than both RPF and GFR.
Option D: Net Filtration Pressure (NFP) is the force (measured in mmHg) that drives the fluid out of the glomerular capillaries and into Bowman's capsule. It is a pressure, not a volume or a rate of flow.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definitions of key parameters in renal physiology, specifically Glomerular Filtration Rate (GFR) as background academic context rather than a clinical decision trigger.
GFR is a vital sign for kidney health. A nurse will often monitor the estimated GFR (eGFR), calculated from a patient's blood creatinine level, age, and sex.
A declining GFR is a key indicator of chronic kidney disease (CKD). Early detection allows for interventions to slow the progression of the disease.
Many medications are cleared by the kidneys. A patient's GFR is critical for determining the correct dosage of these drugs to prevent toxicity or underdosing.

How to Approach the Question

First, analyze the question's keywords: 'amount of plasma', 'entering into Bowman's capsule', and 'per minute'.
The term 'amount per minute' indicates a rate.
The location 'entering into Bowman's capsule' specifies the process of filtration.
Evaluate the options based on these keywords.
'Glomerular Filtration Rate' directly matches the description of a filtration rate at the glomerulus.
Recognize that 'Renal Plasma Flow' and 'Renal Blood Flow' refer to the total flow to the kidney, not the filtered amount.

Concept Tested & Keywords

Concept Tested: Definitions of key parameters in renal physiology, specifically Glomerular Filtration Rate (GFR).
Stem keywords: plasma, Bowman's capsule, per minute
Lead-in keywords: amount

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E6 Physiology Guyton 4SAE Part 2B pp. 19-21, 24-26

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