AP BIOLOGY

Detailed explanation-1: -This process is called ultrafiltration; the resulting fluid, virtually free of large proteins and blood cells, is referred to as glomerular filtrate, or ultrafiltrate. Further modification of ultrafiltrate, by reabsorption and secretion, transforms it into urine.

Detailed explanation-2: -The process of ultrafiltration occurs in the nephrons of the kidneys. The process can be described as follows: Blood flows through the glomerulus that is surrounded by the Bowman’s capsule. The hydrostatic pressure forces the small molecules to leave the glomerulus and enter in the Bowman’s capsule.

Detailed explanation-3: -Ultrafiltration-Ultrafiltration involves filtration of the blood which takes place in the glomerulus. The blood containing urea from the afferent arteriole enters the glomerulus under high pressure. The high pressure is created because the efferent arteriole is narrower than the afferent arteriole.

Detailed explanation-4: -In the glomerulus, blood filters into the Bowman’s capsule in a process called ultrafiltration. Ultrafiltration is simply filtration that occurs under pressure. In this case, the afferent and efferent arterioles are responsible for generating pressure.