In the figure given below the structures associated with human kidneys

1.	In the figure given below the structures associated with human kidneys are marked (X,Y and Z). The relative concentrations of urea in these structure isA. X is sometimes higher than Y B. Y is always higher than Z C. Y is always lower than Z D. Z is sometimes lower than XFor picture
Answer» The structures are labeled as: X – Renal vein Y – Renal artery Z - Ureter The renal artery (Y) carries oxygenated blood to the kidneys from the heart. This blood contains negligible amounts of waste products (such as urea). On the other hand, the ureters (Z) transport urine from the kidneys to the urinary bladder. The urine contains comparatively high amounts of urea to be excreted out. Thus, the relative concentration of urea in Y is always lower than that in Z.

In the figure given below the structures associated with human kidneys are marked (X,Y and Z). The relative concentrations of urea in these structure isA. X is sometimes higher than Y B. Y is always higher than Z C. Y is always lower than Z D. Z is sometimes lower than XFor picture

Answer»

The structures are labeled as:

X – Renal vein

Y – Renal artery

Z - Ureter

The renal artery (Y) carries oxygenated blood to the kidneys from the heart. This blood contains negligible amounts of waste products (such as urea). On the other hand, the ureters (Z) transport urine from the kidneys to the urinary bladder. The urine contains comparatively high amounts of urea to be excreted out. Thus, the relative concentration of urea in Y is always lower than that in Z.

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In the figure given below the structures associated with human kidneys are marked (X,Y and Z). The relative concentrations of urea in these structure isA. X is sometimes higher than Y B. Y is always higher than Z C. Y is always lower than Z D. Z is sometimes lower than XFor picture

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