The right sequence of formation of urine is?

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2020

Explanation

The correct sequence follows the physiological path of fluid through the nephron.
Filtration is the first step, where blood is filtered in the glomerulus to create a filtrate.
Reabsorption follows, where essential substances are returned from the filtrate to the blood.
Secretion is the final step, where additional waste products are actively moved from the blood into the filtrate before it becomes urine.

Option A: This sequence is incorrect. Filtration must occur first to create the filtrate upon which secretion and reabsorption can act.
Option B: This sequence is incorrect. Reabsorption and secretion are processes that modify the filtrate, which can only be formed after filtration.
Option D: This sequence is incorrect. Filtration is the initial step in urine formation and cannot be preceded by secretion.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiology of Urine Formation as background academic context rather than a clinical decision trigger.
Understanding the sequence of urine formation is fundamental for nurses to interpret urinalysis results and comprehend renal pathologies.
Many diuretic medications work by inhibiting the reabsorption step, leading to increased urine output. For example, loop diuretics block reabsorption in the Loop of Henle.
In kidney disease, one or more of these steps may be impaired. A decreased Glomerular Filtration Rate (GFR) is a key indicator of chronic kidney disease.

How to Approach the Question

Identify the keywords in the question: 'right sequence' and 'formation of urine'.
This is a factual recall question about a fundamental physiological process.
Recall the three main steps involved in urine production by the kidneys.
Mentally arrange the steps in their logical order: First, the blood must be filtered. Second, the body must take back what it needs. Third, the body must actively get rid of any remaining waste.
Compare your recalled sequence (Filtration -> Reabsorption -> Secretion) with the given options to find the correct match.

Concept Tested & Keywords

QlhXtDbCso5ioFyHlra-qM

E6 Physiology Guyton 4SAE Part 2B p. 16-18

E6 Nursing Brunner Adult Health 3SA Vol 2 Part 1 p. 124-126

Practise the full RUHS, Jaipur, PB B.Sc Nursing Entrance-2020

Attempt every question from this paper in a timed mock, then review the full solution for each one.