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Multiple Choice
The peritubular capillaries and vasa recta drain into the smallest of veins called the ______ veins.
A
arcuate
B
interlobular
C
segmental
D
lobar
Verified step by step guidance
1
Understand the anatomy of the kidney: The kidney is divided into several regions, including the cortex and medulla. Blood flow through the kidney involves a network of arteries, capillaries, and veins.
Learn the role of peritubular capillaries and vasa recta: These capillaries are involved in reabsorption and exchange of substances between the blood and the filtrate in the nephron. They eventually drain into veins.
Identify the smallest veins in the kidney: The smallest veins in the kidney are the interlobular veins, which collect blood from the peritubular capillaries and vasa recta.
Differentiate between the options provided: Arcuate veins are larger veins located at the boundary between the cortex and medulla. Segmental veins and lobar veins are even larger veins that drain blood from the kidney. Interlobular veins are the correct answer as they are the smallest veins that receive blood from the capillaries.
Conclude that the peritubular capillaries and vasa recta drain into the interlobular veins, based on their anatomical location and function.