The statement is true. The blood enters into the glomerulus by afferent arteriole at very high pressure which filters the component of the blood. This process of filtration of the blood in the Bowman's capsule is ultrafiltration. The filtrate leaving the Bowman's capsule is very similar to blood plasma (filtrate or glomerular filtrate is composed of blood plasma minus plasma protein, i.e., it contains all the components of blood plasma except the proteins) in composition as it passes into the proximal convoluted tubule.