Diameter of the renal afferent arterioles is
a) Same as that of efferent
b) Smaller than that of efferent
c) Larger than that of efferent
d) There is no efferent vessel
Correct answer is option 'C'. Can you explain this answer?

Question

Answer

Afferent arterioles has more diameter than efferent. and that's why there is generation of filtration pressure.

Answer

Pressure Filtration (which cause GFR) is based on difference between the diameters of the 2 veseels afferent and efferent one...the diameter of afferent is more than that of efferent one due to this a pressure difference occur so the GFR...let me explain with a example suppose 2 pipes of different diameters one having large diameters have less speed of water inside it and the another one having less diamter have more speed so more pressure exerted  ..the same is happening here effernt have small diameter so large speed so more pressure exerted....hence facilitates the GFR

Answer

Afferent artiole has larger diameter as compare to effent because afferent divide into many small capillaries in bowmans capsule and blood is filtered and goes in two direction pct and effernt artiole

Answer

Diameter of the renal afferent arterioles

The correct answer is option 'C' - larger than that of efferent.

Explanation:

The renal arterioles are the small blood vessels that supply blood to the kidneys. There are two types of arterioles in the renal system - afferent arterioles and efferent arterioles.

1. Afferent arterioles: These arterioles are responsible for supplying blood to the glomerulus, a network of capillaries in the renal corpuscle. They arise from the interlobular arteries and branch into the glomerulus. Afferent arterioles play a crucial role in the regulation of glomerular filtration rate (GFR) by controlling the blood flow into the glomerulus.

2. Efferent arterioles: These arterioles arise from the glomerulus and carry blood away from the glomerulus. They are responsible for maintaining the high pressure within the glomerulus, which is necessary for the filtration process. Efferent arterioles then divide further into peritubular capillaries, which surround the renal tubules and are involved in the reabsorption and secretion of substances.

Comparison of diameters:

The diameters of afferent and efferent arterioles differ, and this difference is important for the functioning of the kidney.

- The diameter of the afferent arteriole is larger than that of the efferent arteriole. This larger diameter allows for a higher blood flow into the glomerulus, ensuring an adequate supply of blood for filtration.

- On the other hand, the efferent arteriole has a smaller diameter. This constriction in diameter creates resistance to blood flow, leading to increased pressure within the glomerulus. This increased pressure is essential for the filtration process, as it helps in pushing the blood through the glomerular capillaries and facilitates the filtration of waste products and excess fluids.

Conclusion:

In summary, the diameter of the renal afferent arterioles is larger than that of the efferent arterioles. This difference in diameter plays a crucial role in maintaining the proper functioning of the kidney, ensuring an adequate blood supply to the glomerulus and maintaining the necessary pressure for the filtration process.

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