PALS TEST COMPREHENSIVE STUDY
GUIDE 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
◍ Where are the kidneys located?.
Answer: Retroperitoneal in the superior lumbar region.
◍ What is the function of the renal hilus?.
Answer: It leads into the renal sinus where blood vessels, nerves, and
lymphatics enter the kidney.
◍ What structures surround the kidneys?.
Answer: A fibrous renal capsule, a fatty adipose capsule, and an outer
fibrous renal fascia.
◍ What are the three distinct regions of the kidney?.
Answer: The cortex, the medulla, and the renal pelvis.
◍ What is the role of major and minor calyces?.
Answer: They collect urine and empty it into the renal pelvis.
◍ What is the main function of the kidneys?.
Answer: To maintain a stable environment for cell and tissue metabolism by
balancing solute and water transport, excreting metabolic wastes,
maintaining electrolyte balance, and regulating acid-base balance.
◍ Describe the blood supply pathway to the kidneys..
Answer: Renal arteries → segmental arteries → lobar arteries → interlobar
arteries → arcuate arteries → cortical radiate arteries.
◍ What surrounds the kidneys?.
Answer: Renal capsule
◍ What is the entry/exit point for renal blood vessels, nerves, lymphatic
, vessels, and ureter?.
Answer: Hilum
◍ What is the functional unit of the kidney?.
Answer: Nephron
◍ How many nephrons are there per kidney?.
Answer: Approximately 1.2 million
◍ What are the three layers of the glomerular filtration membrane?.
Answer: Inner capillary endothelium, basement membrane, outer capillary
epithelium
◍ What regulates renal blood flow?.
Answer: The renal plexus adjusts the diameter of renal arterioles.
◍ What are nephrons?.
Answer: The structural and functional units of the kidneys that form urine.
◍ What is the primary urine formed from?.
Answer: Filtrate that passes through the glomerular filtration membrane
◍ What are the two types of nephrons?.
Answer: Cortical nephrons (85%) and juxtamedullary nephrons (15%).
◍ What is the glomerular filtration rate (GFR)?.
Answer: The filtration of plasma per unit of time, typically 120 mL/min
◍ What is the structure of a nephron?.
Answer: It consists of a renal corpuscle (glomerulus and Bowman's capsule)
and a renal tubule.
◍ What regulates blood pressure in the kidneys?.
Answer: Juxtaglomerular complex
◍ What is the role of the renin-angiotensin-aldosterone system (RAAS)?.
Answer: To regulate blood pressure and fluid balance
◍ What is the typical urine composition?.
Answer: Clear yellow or amber; cloudiness indicates bacteria, cells, or high
GUIDE 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
◍ Where are the kidneys located?.
Answer: Retroperitoneal in the superior lumbar region.
◍ What is the function of the renal hilus?.
Answer: It leads into the renal sinus where blood vessels, nerves, and
lymphatics enter the kidney.
◍ What structures surround the kidneys?.
Answer: A fibrous renal capsule, a fatty adipose capsule, and an outer
fibrous renal fascia.
◍ What are the three distinct regions of the kidney?.
Answer: The cortex, the medulla, and the renal pelvis.
◍ What is the role of major and minor calyces?.
Answer: They collect urine and empty it into the renal pelvis.
◍ What is the main function of the kidneys?.
Answer: To maintain a stable environment for cell and tissue metabolism by
balancing solute and water transport, excreting metabolic wastes,
maintaining electrolyte balance, and regulating acid-base balance.
◍ Describe the blood supply pathway to the kidneys..
Answer: Renal arteries → segmental arteries → lobar arteries → interlobar
arteries → arcuate arteries → cortical radiate arteries.
◍ What surrounds the kidneys?.
Answer: Renal capsule
◍ What is the entry/exit point for renal blood vessels, nerves, lymphatic
, vessels, and ureter?.
Answer: Hilum
◍ What is the functional unit of the kidney?.
Answer: Nephron
◍ How many nephrons are there per kidney?.
Answer: Approximately 1.2 million
◍ What are the three layers of the glomerular filtration membrane?.
Answer: Inner capillary endothelium, basement membrane, outer capillary
epithelium
◍ What regulates renal blood flow?.
Answer: The renal plexus adjusts the diameter of renal arterioles.
◍ What are nephrons?.
Answer: The structural and functional units of the kidneys that form urine.
◍ What is the primary urine formed from?.
Answer: Filtrate that passes through the glomerular filtration membrane
◍ What are the two types of nephrons?.
Answer: Cortical nephrons (85%) and juxtamedullary nephrons (15%).
◍ What is the glomerular filtration rate (GFR)?.
Answer: The filtration of plasma per unit of time, typically 120 mL/min
◍ What is the structure of a nephron?.
Answer: It consists of a renal corpuscle (glomerulus and Bowman's capsule)
and a renal tubule.
◍ What regulates blood pressure in the kidneys?.
Answer: Juxtaglomerular complex
◍ What is the role of the renin-angiotensin-aldosterone system (RAAS)?.
Answer: To regulate blood pressure and fluid balance
◍ What is the typical urine composition?.
Answer: Clear yellow or amber; cloudiness indicates bacteria, cells, or high
