Question

The afferent and efferent vessels are
(a) Arterial in nature
(b) Venous in nature
(c) One is arterial and the other is Venous
(d) None of the above

Answer 1

They carry blood away from the heart. It has a system that has a high- pressure portion of the circulatory system, with pressure varying between the peak pressure during heart contraction ( systolic pressure) and the minimum (diastolic) pressure between contractions when the heart expands and contracts.

Complete step by step answer:
The renal artery enters the kidney and they branch off to the renal arterioles, which enters the Bowman's capsule as an afferent vessel/arteriole with the large lumen. This afferent vessel forms a knot like a bunch of capillaries network, called because the glomerulus emerges out as an efferent vessel/arteriole with a smaller lumen.
So, the correct answer is, ‘Arterial in nature.’

Note:
- Different and different vessels are basically present in the renal system of the human body. They are located at the glomerulus complex where afferent arterioles bring blood to the glomerulus and efferent arterioles carry it away from the glomerulus to form small capillaries or bundles of vessels.
- Different and different vessels are arterial in nature as they have to carry blood away from the heart to the glomerulus but not vice versa, which is not back to the heart which is the function of veins.
- Both afferent and efferent arterioles carry the blood to the renal system. Different from the glomerulus and different away from the glomerulus to form small capillaries in the medulla or bundle of vessels around the cortex. But, they do not take them back to the heart.
- Hence, to carry such huge pressure difference, ultrafiltration can occur in afferent and efferent vessels, which have to be arterial in nature to carry such a high- pressure one. As veins carry low pressure.