Question

Mention how the afferent and efferont arterioles are adapted for movement of molecules into the Bowmen's capsule.​

Answer 1

Answer:

Bowman's capsule (or the Bowman capsule, capsula glomeruli, or glomerular capsule) is a cup-like sac at the beginning of the tubular component of a nephron in the mammalian kidney that performs the first step in the filtration of blood to form urine. A glomerulus is enclosed in the sac. Fluids from blood in the glomerulus are collected in the Bowman's capsule.

Explanation:

Constriction of the afferent arterioles has two effects: it increases the vascular resistance which reduces renal blood flow (RBF), and it decreases the pressure downstream from the constriction, which reduces the GFR. ... The net result of efferent arteriolar constriction is an increased filtration fraction.

Answer 2

Question:

Mention how the afferent and efferont arterioles are adapted for movement of molecules into the Bowmen's capsule.

Answer:

The barrier permits the passage of water, ions, and small molecules from the bloodstream into the Bowman's space.

The barrier prevents the passage of large and/or negatively charged proteins.

The basal lamina of the filtration barrier is composed of three layers.

Normally the afferent arteriole is of larger diameter than the efferent.

Overall the constriction of the afferent arteriole decreases both blood flow and filtration pressure where as constricting the efferent arteriole decreases blood flow but increases filtration pressure.

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