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What occurs in the ascending loop of Henle?

What occurs in the ascending loop of Henle?

In the ascending portion, the loop becomes impermeable to water and the cells of the loop actively reabsorb solutes from the luminal fluid; therefore water is not reabsorbed and ions are readily reabsorbed. Overall the loop of Henle reabsorbs around 25% of filtered ions and 20% of the filtered water in a normal kidney.

What is the primary function of the ascending loop of Henle?

The primary function of the loops of Henle and the thick ascending limb of the distal tubule is the concentration of urine utilizing a principle called ‘countercurrent multiplication. ‘ The medulla possesses a gradient of urea and salt with increasing concentrations of these solutes closer to the papillae.

What is the function of the ascending loop of Henle quizlet?

What is the major function of the Loop of Henle, Distal Tubule, and Collecting Duct? 1. The major function is to control the rate of water and solute excretion and match these rates to fluid and electrolyte balance.

What happens in the thick ascending limb?

As the thick ascending limb is impermeable to water, the interstitium becomes concentrated with ions, increasing the osmolarity. This drives water reabsorption from the descending limb as water moves from areas of low osmolarity to areas of high osmolarity.

What is the difference between Vasa recta and peritubular capillaries?

The main difference between vasa recta and peritubular capillaries is that the vasa recta are the blood capillaries that surround the loop of Henle in the juxtamedullary nephrons. But, peritubular capillaries are the blood capillaries that surround the PCT and DCT of the cortical nephrons.

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What happens to blood as it passes through the peritubular capillaries of the Vasa recta?

Essentially, the peritubular capillaries reabsorb useful substances such as glucose and amino acids and secrete certain mineral ions and excess water into the tubule. This blood leaves the glomerulus via the efferent arteriole, which supplies the peritubular capillaries.

Which is the correct path of blood flow in a nephron?

Blood flows into your kidney through the renal artery. This large blood vessel branches into smaller and smaller blood vessels until the blood reaches the nephrons. In the nephron, your blood is filtered by the tiny blood vessels of the glomeruli and then flows out of your kidney through the renal vein.

What is selective secretion?

Tubular secretion is one of many steps in the process of filtering blood to produce liquid waste in the form of urine. Within the excretory system of many organisms, this is important for both waste removal and acid-base balance.

Are peritubular capillaries fenestrated?

Cortical peritubular capillaries are fenestrated, with large surface areas and high hydraulic conductivity. It is generally accepted that fluid is driven into the cortical interstitium from the PCT due to the generation of a locally hypertonic fluid within the lateral intercellular space between PCT epithelial cells.

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What are the 3 main phases that occur as blood flows through a nephron?

The nephrons of the kidneys process blood and create urine through a process of filtration, reabsorption, and secretion. Urine is about 95% water and 5% waste products. Nitrogenous wastes excreted in urine include urea, creatinine, ammonia, and uric acid.

What are the 2 structures that make up a nephron?

A nephron is made of two parts: a renal corpuscle, which is the initial filtering component, and. a renal tubule that processes and carries away the filtered fluid.

What are major parts of nephron?

Each nephron is composed of a renal corpuscle (glomerulus within Bowman’s capsule), a proximal tubule (convoluted and straight components), an intermediate tubule (loop of Henle), a distal convoluted tubule, a connecting tubule, and cortical, outer medullary, and inner medullary collecting ducts.