AP BIOLOGY

Detailed explanation-1: -Each of your kidneys is made up of about a million filtering units called nephrons. Each nephron includes a filter, called the glomerulus, and a tubule. The nephrons work through a two-step process: the glomerulus filters your blood, and the tubule returns needed substances to your blood and removes wastes.

Detailed explanation-2: -Ultrafiltration is the process of filtering small molecules from blood to the glomerular filtrate at the glomerular capsule. On the other hand, selective reabsorption is the process of absorbing important substances from the ultrafiltrate back to the blood at the proximal convoluted tubule.

Detailed explanation-3: -Reabsorption and secretion take place simultaneously in the tubular part (PCT, Loop of Henley, DCT) of the nephron.

Detailed explanation-4: -This e-module will describe the main functions of each part of the nephron. It will then describe and differentiate the components of the processes of filtration, reabsorption, secretion, and excretion.