Question

Place the correct word into each sentence to describe tubular secretion and reabsorption.

glucose Tubular________ arand secretion occurs with varying solutes in the renal tubules
lactate In the_________ there is secretion of urea, H+, creatine, and uric acid.
descending Conversely, there is a noticeable reabsorption of amino acids, urea, and vitamins in the same region of the tubule.
ascending

DCT
Absorbed Once in the nephron loop, the nephron loop, the_____ limb reabsorbs water.
PCT Heading up the limb, urea is secreted.
reabsorption In the DCT, _______can be reabsorbed and secreted heading into the collecting duct.

Answer 1

Tubular reabsorption is the process of reclaiming substances from the filtrate back into the blood, predominantly occurring in the PCT and ascending limb of the loop of Henle. Tubular secretion refers to the addition of waste substances into the filtrate, primarily taking place in the DCT and the early part of the collecting duct. The given statements should be completed using 'reabsorption' for glucose, 'ascending limb of the loop of Henle' for lactate, 'water' in the ascending DCT, 'urea' in the PCT heading, and 'calcium and phosphorus' in the DCT.

Step-by-step explanation:

Tubular reabsorption and secretion are key processes in the formation of urine in the kidneys. Tubular reabsorption refers to the process by which solutes and water are reclaimed from the filtrate and returned to the blood. This occurs mainly in the proximal convoluted tubule (PCT) and the loop of Henle. Specifically, glucose tubular reabsorption occurs in the PCT where substances such as glucose and amino acids are reabsorbed, while in the ascending limb of the nephron loop, water is reabsorbed. Tubular secretion, on the other hand, is the process where wastes that are not reabsorbed, like urea, uric acid, and excess H+ ions, are added to the filtrate. This mainly happens in the distal convoluted tubule (DCT) and the early part of the collecting duct.

Completing the sentences with the appropriate terms: glucose Tubular reabsorption, lactate In the ascending limb of the loop of Henle, descending Conversely, there is a noticeable reabsorption, ascending DCT Absorbed water, PCT Heading up the limb, urea, reabsorption In the DCT, calcium and phosphorus can be reabsorbed and secreted heading into the collecting duct.