ANATOMY

Detailed explanation-1: -Substances such as glucose and amino acids, useful to the body are reabsorbed from the tubule in the proximal tubule. Proximal tubule is the portion of the nephron that lies between Bowman’s capsule and the loop of Henle.

Detailed explanation-2: -Most of the Ca++, Na+, glucose, and amino acids must be reabsorbed by the nephron to maintain homeostatic plasma concentrations. Other substances, such as urea, K+, ammonia (NH3), creatinine, and some drugs are secreted into the filtrate as waste products.

Detailed explanation-3: -The reabsorption of water, salts, and nutrients occurs in the renal tubule of a nephron. Most water (about 70%), salt (65%), and glucose (100%) are reabsorbed in the proximal convoluted region of the renal tubule.

Detailed explanation-4: -Glucose, amino acids, NaCl and other essential salts are reabsorbed in the second step of urine formation i.e Tubular Reabsorption. These essential substances are filtered from blood in the first step called glomerular filtration and are reabsorbed as they are vital for body function.