Question

Osmolarities of the filtrate Please label the nephron with the correct osmolarities of the filtrate at that particular point: Bowman's Initial capsule filtrate Proximal tubule Distal tubule Osmolarity 100 interstitial fluid (mOsm/l) 1200 300 Blood Thick 300 segment of Collecting ascending duct llimb 2o0t 400 400 Cortex Descending limb Loop 600 of Henle 4001 600 600 Outer medulla 900 700 3 900 Thin segment of ascending limb Inner medulla 200 To renal pelvis

Answer 1

The osmolarities of the filtrate at different points in the nephron are provided as: Bowman's Capsule Filtrate (100 mOsm/L), Proximal Tubule (1200 mOsm/L), Thick Ascending Limb of the Loop of Henle (300 mOsm/L), Thin Ascending Limb of the Loop of Henle (200 mOsm/L), Distal Tubule (400 mOsm/L), and Collecting Duct (600 mOsm/L in the Cortex and 900 mOsm/L in the Outer Medulla and Inner Medulla).

Step-by-step explanation:

The osmolarities of the filtrate at different points in the nephron are as follows:

1. Bowman's Capsule Filtrate: 100 mOsm/L
2. Proximal Tubule: 1200 mOsm/L
3. Thick Ascending Limb of the Loop of Henle: 300 mOsm/L
4. Thin Ascending Limb of the Loop of Henle: 200 mOsm/L
5. Distal Tubule: 400 mOsm/L
6. Collecting Duct: 600 mOsm/L (Cortex) and 900 mOsm/L (Outer Medulla and Inner Medulla)

Answer 2

This is the list with the correct osmolarities of the filtrate at each part of the nephron:

• Bowman's capsule ⇒ 300
• Proximal tubule ⇒ 300
• Distal tubule ⇒ 1200
• Thick ascending limb of loop of Henle ⇒ 600
• Descending limb of loop of Henle (thick segment) ⇒ 900
• Thin segment of ascending limb of loop of Henle ⇒ 200
• Thin segment of descending limb of loop of Henle ⇒ 1200
• Collecting duct (cortex) ⇒ 400
• Collecting duct (outer medulla) ⇒ 600
• Collecting duct (inner medulla) ⇒ 1200
• Renal pelvis ⇒ 100

What are these osmolarities?

The kidney's nephron filters blood, reabsorbs solutes, and concentrates urine. The filtrate, initially similar to blood in osmolarity, is altered as it passes through the nephron's segments. The proximal tubule reabsorbs water and solutes, reducing osmolarity.

The loop of Henle concentrates urine via a countercurrent exchange mechanism. The collecting duct adjusts water permeability based on the body's needs. The inner medulla allows for further urine concentration. Finally, the renal pelvis collects concentrated urine for excretion.