★ Kidney - Loop of Henlé Quiz
The pigments that give urine its yellow or amber color are derived from
A. salt
B. urea
C. bile and hemoglobin molecules
D. plasma proteins
Select your answer:

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Regulation of Urine Formation › ViewCountercurrent mechanism to maintain the concentration gradient in the medullary interstitium. This special arrangement occurs in:-
A. PCT and capillary net
B. DCT and PCT
C. Henle’s loop and vasa recta
D. PCT and collecting duct
Skeletal Muscle Anatomy › View
Which is the largest?
A. fascicle
B. muscle fiber
C. muscle
D. myofilament