Those blood vessels which surround the proximal tubules are known as:
Correct answer: A. Peritubular capillaries
- A. Peritubular capillaries
- B. Afferent arterioles
- C. Glomerulus
- D. Vasa recta
Explanation
The peritubular capillaries are the blood vessels that surround the proximal tubules. They function primarily in the reabsorption of water, ions, and other substances from the filtrate back into the bloodstream, maintaining homeostasis. The afferent arterioles deliver blood to the glomerulus, where filtration occurs. The glomerulus is involved in the initial stage of urine formation, filtering blood plasma. Lastly, the vasa recta are associated with the loop of Henle, playing a role in the concentration of urine, not directly surrounding the proximal tubules.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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