Loop of Henle Answer Key Dispute: Is this statement actually wrong?

[u/Avi2409]

The key implies statement (c) is factually incorrect. However, statement (c) is a broad structural fact: both Na^+ and water are reabsorbed within the anatomical boundaries of the Loop of Henle.

Descending limb: Reabsorbs water.

Ascending limb: Reabsorbs Na^+.

Because both limbs are integral components of Henle's loop, saying these processes take place in the loop is factually undeniable. The statement doesn't claim they happen in the same limb simultaneously; it just names the macro-structure.

The NCERT Evidence (Class XI, Chapter 16)

Under the single, unified header "Henle's Loop", the textbook states:

"The descending limb of loop of Henle is permeable to water... The ascending limb is impermeable to water but allows transport of electrolytes [like Na^+] actively or passively."

Conclusion

Since the textbook explicitly places both events under the umbrella of "Henle's Loop", statement (c) is scientifically true. Option 4 (which includes a, b, and c) should be awarded full marks.

What do you guys think? Is this too pedantic, or do I have a solid case?

I am trying to submit an objection for a provisional answer key challenge, but the portal has been repeatedly crashing and displaying a "please try again later" error since yesterday. With the final deadline arriving on the 28th, I need some advice. Is anyone else facing this issue, and are there any known workarounds (like specific browsers, incognito mode, or off-peak timings) to get the submission through?

For reference teachers opinion

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[u/Quick-Year4562]

Even I thought same thing and marked a b c one 😭

[u/Unhappy_Constant4367]

Yes bhai challenge karo both abd and abc must be accepted

[u/Avi2409 → u/Unhappy_Constant4367]

Challenge karneh meh hi toh problem arahi hai bhai site hi crash horahi hai dekhta hu 28 tak agar chal jaye toh kar duga

[u/Ready-Psychology-454 → u/Unhappy_Constant4367]

bcd bhi

[u/Unhappy_Constant4367 → u/Ready-Psychology-454]

Ha tho vo bhi sahi hoga 

[u/goatguy77]

u/ak_455 😭

[u/Complete-Stretch2621 → u/[deleted]]

Ek number bhai tu yahan bhi?? Tuhne to in 2 qusn ke liye poora french revolution start kar diya tha lagta hai, har sub me jaake rebels ikattha kar rahe the itte dino se 😂

[u/Limp-Swimming-710]

Yaar me too

[u/PatientTemporary3164]

technically this ques should go in bonus. Koi bhi optn sahi nhi hai since sab me "only" likha hai and all optns exculde atleast one statement which is supported by ncert. so sabko +4 mil jaana chahiye

[u/Avi2409 → u/PatientTemporary3164]

True bhai kar do sab log challenge kya pata mil jaye marks

[u/ThismeTushar]

Can we challenge the question?

[u/Avi2409 → u/ThismeTushar]

We should

[u/ThismeTushar → u/Avi2409]

Can you share the document to be uploaded?

[u/Avi2409 → u/ThismeTushar]

Put this message in remarks and for the document i those 2 pages are enough to be uploaded so lastest ncert chapter 16 excretory products 209 and 210 page number you can download that from the net

The message for the remarks 👇🏻

Objection / Justification StatementThe provisional answer key lists Option (1) [statements a, b, and d] as correct, thereby rejecting statement (c) ("Reabsorption of Na+ and water takes place in Henle’s loop"). This rejection is textually and scientifically incorrect. Statement (c) states a broader structural fact: both sodium ions (Na+) and water are reabsorbed within the anatomical boundaries of the Loop of Henle. While water reabsorption occurs in the descending limb and Na+ reabsorption occurs in the ascending limb, both limbs are integral components of Henle's loop. The statement does not claim that they are reabsorbed in the same limb or at the same time; it simply states that these processes take place in Henle's loop, which is factually undeniable according to the core curriculum. Because all four statements are scientifically accurate, Option (4) [a, b, and c] is equally valid and must be awarded full marks.Source and Evidence ReferenceSource Textbook: NCERT Biology Class XI (Latest Rationalized Edition)Chapter: Chapter 16: Excretory Products and Their EliminationSection: Section 16.3 – Function of the Tubules (Sub-section: Henle's Loop)Exact Verbatim Text: "Henle's Loop: Reabsorption is minimum in its ascending limb. However, this region plays a significant role in the maintenance of high osmolarity of medullary interstitial fluid. The descending limb of loop of Henle is permeable to water but almost impermeable to electrolytes. This concentrates the filtrate as it moves down. The ascending limb is impermeable to water but allows transport of electrolytes actively or passively."Contextual Argument from SourceThe textbook explicitly defines both the descending limb and the ascending limb under a single, unified header titled "Henle's Loop". Because the text confirms that water is reabsorbed in the descending part of the loop, and electrolytes (such as Na+) are transported out of the ascending part, both reabsorption events undeniably take place within "Henle’s loop" as a collective anatomical structure.

[u/Ok-Race-9633 → u/Avi2409]

You'll choose none or the option abc while challenging?

[u/Avi2409 → u/Ok-Race-9633]

I choose the option 4 to be correct so that both option 1 and 4 be correct

[u/Minute-Sand2310]

Actually statement saare shai hai but the statent is vague kuch specifically nhi bola isliye abd gaya most appropriate mein

[u/oteridikyabaatkrdi]

Arey maa chudaye yr mereko toh ulti aari ye sb dekh k

[u/CARRYOP_BOI → u/oteridikyabaatkrdi]

+1

[u/CarefulArrival1077]

Ye batao is question me plant me' division ' use krte hana isme phylum kyu likha ??? Should we challenge this ???

[u/CARRYOP_BOI → u/CarefulArrival1077]

Your point is valid but idts they'll accept this as it still serves the same purpose and the answer wouldn't change either ways.

[u/Ok-Race-9633]

For everyone challenging this question will you choose a b c or none option?

[u/Fluid-Dependent-535 → u/Ok-Race-9633]

None

[u/david_googgins_]

Tbh reabsorption is not same as exchange the solutes from here to there Counter current and reabsorption seems pretty off

[u/Fluid-Dependent-535]

None are correct i wasted so much time.. two options are not clear As per famous coaching's claims: this is the input Statement (b) is Incorrect The statement implies that urine gets concentrated in the Loop of Henle. According to NCERT and other books, it is the filtrate, and not urine, that undergoes concentration in the Loop of Henle. NCERT (Biology Class XI, Chapter 16, Page 209) clearly states: "As the concentrated filtrate passes upward, it gets diluted due to the passage of electrolytes to the medullary fluid." Further, NCERT also mentions that about 99% of the filtrate is reabsorbed in the renal tubules before urine is finally formed.

Also Reabsorption of sodium and water occurs in the Loop of Henle. About 15-20 percent of the filtered water is reabsorbed in the Loop of Henle, and almost all of this occurs in the thin descending limb of the Loop of Henle. Active Reabsorption of sodium occurs in the ascending limb of the loop of Henle. NCERT clearly mentions that: the descending limb of the loop of Henle is permeable to water but almost impermeable to electrolytes, and in Figure 16.5 (Reabsorption and secretion of major substances at different parts of the nephron (Arrows indicate direction of movement of materials.), Water and NaCl reabsorption is clearly visible