GENERAL HISTOLOGY

Detailed explanation-1: -Urea is not reabsorbed during urine formation.

Detailed explanation-2: -Most of the reabsorption of solutes necessary for normal body function such as amino acids, glucose, and salts takes place in the proximal part of the tubule. This reabsorption may be active, as in the case of glucose, amino acids, and peptides, whereas water, chloride, and other ions are passively reabsorbed.

Detailed explanation-3: -Answer and Explanation: The substances that are not filtered through the nephrons are plasma proteins and blood cells as their large size prevents them from crossing the fenestrations of the glomerular filtration membrane.

Detailed explanation-4: -As the glomerular filtrate passes through the tubular part of the nephron, the useful substances such as glucose, amino acids, salts and water are reabsorbed by the blood capillaries surrounding the nephron and only the waste substances such as urea and excess water remain behind in the tubule.

Detailed explanation-5: -14. What substances are not reabsorbed and why: Some substances that are not reabsorbed or incompletely reabsorbed remain in the filtrate due to a lack of carrier molecules, lipid insolubility, or large size such as urea, creatinine, and uric acid.