SHolroydAtWeilCornellMedQatar/Urology/Kidney/Tubules/WaterReabsorption/EffectOfIncrease

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2020年4月2日 (木) 15:00時点におけるAdmin (トーク | 投稿記録)による版
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POINT!

narrated video explanation

WaterReabsorptionBaseLine-Eng.jpg

Prior to the water reabsorption from the tubule increasing (at baseline), we will make the assumption that the subject is in homeostasis with normal plasma and urine osmolarities (isotonic) and urine volume.

WaterReabsorptionEffectOfIncreasing-2Eng.jpg

Step 1: Suppose that the water reabsorption from the tubule increases.

WaterReabsorptionEffectOfIncreasing-3Eng.jpg

Step 2: With the increase in water reabsorption, diluted (hypotonic) solution enters the plasma. This decreases plasma osmolarity (diluted, hypotonic). Because diluted (hypotonic) solution leaves the tubule due to reabsorption, the fluid remaining in the tubule has an increased osmolarity (concentrated, hypertonic). Also, with the increase in water reabsorption, there is less water remaining in the tubule. Overall, the urine becomes concentrated and decreases in volume.


Challenge Quiz

1.

With an increase in the water reabsorption from the tubule, urine volume increases decreases .

2.

With an increase in the water reabsorption from the tubule, urine osmolarity increases decreases .

3.

With an increase in the water reabsorption from the tubule, plasma osmolarity increases decreases .