NEET-UG Biology · Class 11
Making urine concentrated — NEET & JEE Questions
Making urine concentrated is a topic in Excretory Products and their Elimination, a Class 11 Biology chapter of the NEET-UG syllabus. TestBudy holds 15 published NEET-UG questions on Making urine concentrated, each with the marking scheme of the real paper. The ideas it examines include How the loop builds a salt gradient, Role of urea and vasa recta in the gradient.
- questions
- 15
- shown here
- 10
Five free tests with an account. Your score comes with the result; where you stand is Pro.
Key formulas and concepts
The ideas Making urine concentrated is examined on, as they are tagged in the syllabus tree.
- How the loop builds a salt gradient
- Role of urea and vasa recta in the gradient
Making urine concentrated MCQs with solutions
10 of the 15 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
The ascending limb is relatively impermeable to:
- A. water
- B. all ions
- C. urea always
- D. sodium and chloride
The descending limb is relatively permeable to:
- A. glucose by active transport only
- B. sodium chloride only but not water
- C. proteins
- D. water
The nephron structure that establishes a counter-current gradient together with vasa recta:
- A. loop of Henle
- B. glomerulus only
- C. Bowman capsule
- D. urethra
What is the basic mechanism involving the loop of Henle and vasa recta that helps concentrate urine?
- A. Simple filtration only
- B. Counter-current mechanism
- C. Cardiac conduction
- D. Portal circulation
Why is the medullary interstitium of the kidney highly osmotic?
- A. Plasma proteins are filtered into the medulla
- B. Glucose is stored there as glycogen
- C. Sodium chloride and urea accumulate in the medulla
- D. Oxygen is actively secreted into the tubule
What is the role of the vasa recta in urine concentration?
- A. It stores concentrated urine
- B. It produces filtrate directly inside Bowman's capsule
- C. It secretes ADH into the collecting duct
- D. It acts as a counter-current exchanger that helps preserve the medullary osmotic gradient
The counter-current mechanism in the kidney helps
- A. maintain a medullary osmotic gradient for water reabsorption
- B. eliminate all salts from blood
- C. stop filtration in the glomerulus
- D. make Bowman's capsule impermeable to water
Why do juxtamedullary nephrons contribute strongly to the production of concentrated urine?
- A. Their long loops of Henle extend deep into the hyperosmotic medulla
- B. They lack glomeruli
- C. Their Bowman's capsules secrete ADH
- D. They empty directly into the renal artery
Water is removed from a collecting duct as it passes through a hyperosmotic medulla. What must also be true for substantial water reabsorption to occur?
- A. The collecting duct must be impermeable to water
- B. The collecting duct must be sufficiently permeable to water
- C. The glomerulus must stop filtering
- D. The renal pelvis must actively pump water
Given below are two statements: Statements I: Concentrated urine is formed due to counter current mechanism in nephron. Statement II: Counter current mechanism helps to maintain osmotic gradient in the medullary interstitium. In the light of the above statements, choose the most appropriate answer from the options given below.
- A. Statement I is correct but Statement II is incorrect.
- B. Statement I is incorrect but Statement II is correct.
- C. Both Statement I and Statement II are correct.
- D. Both Statement I and Statement II are incorrect.
Common mistakes in Making urine concentrated
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Assuming salt and water must always move together across a nephron segment.
- Assuming removal of medullary solute would make water leave the collecting duct more readily.
- Assigns the main salt-pumping role to the descending limb.
- Assumes concentrated urine can be produced without a medullary osmotic gradient.
Practise this chapter
Reading a question and answering it under a clock are different things. A chapter-length test measures whether the topic went in.