Which part of the nephron is involved in filtration?
proximal convoluted tubule peritubular capillary loop of henle glomerular capsule.

The correct answer is glomerular capsule.

Explanation:

The glomerular capsule or the Bowman's capsule refers to a cup-like sack at the initiation of the tubular part of a nephron in the kidney of a mammal, which performs the initial step in the filtration of blood to produce urine. In Bowman's capsule, the blood filtration process is termed as glomerular filtration or ultrafiltration.  

The usual rate of filtration is 125 millimeters per minute. Any small molecules like glucose, water, amino acids, salts, and urea can pass into the Bowman's space without any hindrance, however, the platelets, cells, and large proteins do not passes through.  

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.