Home
Class 12
BIOLOGY
We can produce concentrated? Dilute urin...

We can produce concentrated? Dilute urine. This is facilitated by a special mechanism. Identify the mechanism.

A

Reabsorption from PCT

B

Reabsorption from Collecting Duct

C

Reabsorption/Secretion in OCT

D

Counter current mechanism in Henle's loopNasa recta

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the mechanism that facilitates the production of concentrated or dilute urine, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Urine Formation**: - Urine formation occurs in three main steps: glomerular filtration, tubular reabsorption, and tubular secretion. Each step plays a crucial role in determining the final composition of urine. 2. **Normal Conditions**: - Under normal physiological conditions, the kidneys typically produce dilute urine. This is because the body needs to eliminate excess water, and the kidneys adjust urine concentration accordingly. 3. **Need for Concentrated Urine**: - In situations where the body needs to conserve water (e.g., dehydration or high solute intake), the kidneys must produce concentrated urine. This is an adaptive response to maintain homeostasis. 4. **Identifying the Mechanism**: - The production of concentrated urine is facilitated by a specific mechanism. Among the options provided: - Reabsorption from PCT (Proximal Convoluted Tubule) - Reabsorption from the collecting duct - Reabsorption/secretion in the DCT (Distal Convoluted Tubule) - Counter current mechanism in Henle's loop 5. **Counter Current Mechanism**: - The correct mechanism that allows for the production of concentrated urine is the **counter current mechanism**. This mechanism involves the interaction between the descending and ascending limbs of the loop of Henle and the vasa recta. - The counter current multiplier system creates a concentration gradient in the renal medulla, which facilitates the reabsorption of water from the collecting ducts. As water is reabsorbed, urine becomes more concentrated. 6. **Conclusion**: - Therefore, the mechanism that facilitates the production of concentrated urine is the **counter current mechanism in Henle's loop**. ### Final Answer: The mechanism that facilitates the production of concentrated or dilute urine is the **counter current mechanism in Henle's loop**. ---
Promotional Banner

Topper's Solved these Questions

  • Monera

    TRUEMEN BIOLOGY ENGLISH|Exercise ASSERTION AND REASON|14 Videos

  • NCERT Exemplar Questions +1 ( DIGESTION AND ABSORBTION)

    TRUEMEN BIOLOGY ENGLISH|Exercise MCQs|9 Videos

Similar Questions

Explore conceptually related problems

In the given reaction mechanisms identify I ?

Assertion :- Human kidneys can produce urine nearly four times concentrated than the initial filtrate formed. Reason :- Counter current mechanism helps to maintain a concentration gradient in the medullary interstitium.

Assertion :- Mammals have the ability to produce a concentrated urine. Reason :- Counter current mechanism occurs in vasa recta and Henle's loop.

The ability of producing concentrated (hypertonic) urine in vertebrates generally depends on

The ability of producing concentrated (hypertonic) urine in vertebrates generally depends on

Statement (A): Humans have the ability to produce concentrated urine. Statement (B) : Majority of the nephrons in the human kidney have very long loops of Henle and well-developed vasa recta which are involved in countercurrent mechanism.

Human kidneys can produce urine nearly ____A____times concentrated than initial filtrate formed . Select the option which correctly describes 'A' in the above statement.

2,2-Dimethyloxirane can be cleaved by acid (H^(o+)) . Write the mechanism.

Many proteins are secreted in their inactive form . This is also true to may toxic proteins produced by microorganisms. Explain how the mechanism is useful for the organism producing the toxin ?

3,3-dimethylbutan-2-ol losses a molecule of water in the presence of concentrated sulphuric acid to give tertramethylethylene as a major product. Suggest a suitable mechanism.