12 public questions tagged with this topic.
The juxtaglomerular apparatus (JGA) helps regulate blood pressure by releasing renin, which activates the renin-angiotensin system.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Regulation of Kidney Function - RAAS ADH ANF
The collecting duct plays a crucial role in the final concentration of urine under the influence of ADH.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Regulation of Kidney Function - RAAS ADH ANF
The PCT is responsible for reabsorbing essential nutrients like glucose, amino acids, and ions back into the bloodstream.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Urine Formation - Reabsorption and Secretion
Aldosterone primarily regulates sodium reabsorption, while ADH controls water reabsorption.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Urine Formation - Reabsorption and Secretion
The Henle’s loop helps concentrate urine by maintaining an osmotic gradient in the medulla.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Urine Formation - Glomerular Filtration
The distal convoluted tubule (DCT) reabsorbs sodium and water under the influence of aldosterone.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Nephron Structure - Tubules PCT Loop of Henle DCT Collecting Duct
The renal vein carries deoxygenated but filtered blood away from the kidney, not oxygenated blood.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Nephron Structure - Glomerulus and Bowmans Capsule
Juxtamedullary nephrons have longer loops of Henle that extend deep into the medulla, aiding in urine concentration.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Nephron Structure - Glomerulus and Bowmans Capsule
Secretion involves the active transport of substances like H+, K+, and ammonia from the blood into the nephron tubule.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Nephron Structure - Glomerulus and Bowmans Capsule
The liver, not the kidney, produces bile for digestion.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Nephron Structure - Glomerulus and Bowmans Capsule
The juxtaglomerular apparatus detects changes in blood pressure and regulates renin secretion accordingly.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Human Excretory System - Kidney and Ureters
Go with C — 1–1.5 million. Within Excretory System, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, 1–1.5 million is the option that correctly names the structure, process, or principle asked for in Excretory System. Holding that picture in mind makes 1–1.5 million feel natural rather than something you only memorise. Link the term to a real body example (organ, tissue, or ion flow) so the idea stays concrete under exam pressure. A short mental diagram helps — start from stimulus or structure, follow the pathway, and stop at the functional result described by 1–1.5 million.
Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.
