- What is the Vasa recta and where is it found?
- Where does blood leaving the glomerulus go next?
- What hormone causes water to be reabsorbed back into the peritubular capillaries?
- What are the two capillary beds of the nephron?
- How does the urinary system respond to blood that has become acidic?
- What happens to blood as it passes through the peritubular capillaries or the Vasa recta?
- What will happens if blood flow through the vasa recta is increased substantially?
- What is the difference between peritubular capillaries and Vasa recta?
- How does blood enter and leave the kidney?
- Where do the peritubular capillaries drain into?
- What is the Vasa recta blood vessels function?
- Do peritubular capillaries have fenestrations?
What is the Vasa recta and where is it found?
The vasa recta of the kidney, (vasa rectae renis) are the straight arterioles, and the straight venules of the kidney, – a series of blood vessels in the blood supply of the kidney that enter the medulla as the straight arterioles, and leave the medulla to ascend to the cortex as the straight venules..
Where does blood leaving the glomerulus go next?
Blood leaving the glomerulus flows into the efferent arteriole. Usually an arteriole flows into a venule. But in this case the efferent arteriole flows into more capillaries, the peritubular capillaries, and, in juxtamedullary neurons (see below), the vasa recta.
What hormone causes water to be reabsorbed back into the peritubular capillaries?
While much of the reabsorption and secretion occur passively based on concentration gradients, the amount of water that is reabsorbed or lost is tightly regulated. This control is exerted directly by ADH and aldosterone, and indirectly by renin. Most water is recovered in the PCT, loop of Henle, and DCT.
What are the two capillary beds of the nephron?
The renal tubule of every nephron is closely associated with two capillary beds: the glomerulus and the peritubular capillaries. The glomerulus, in which the capillaries run in parallel, is specialized for filtration.
How does the urinary system respond to blood that has become acidic?
How does the urinary system respond to blood that has become acidic? Blood buffers are important in maintaining blood pressure. … When blood pH becomes too acidic, the tubule cells of the kidneys excrete bicarbonate ions and retain hydrogen ions.
What happens to blood as it passes through the peritubular capillaries or the Vasa recta?
Peritubular capillaries surround the cortical parts of the proximal and distal tubules, while the vasa recta go into the medulla to approach the loop of Henle. … The higher osmolarity of the blood in the peritubular capillaries creates an osmotic pressure which causes the uptake of water.
What will happens if blood flow through the vasa recta is increased substantially?
The vasa recta, the capillary networks that supply blood to the medulla, are highly permeable to solute and water. … A substantial increase in vasa recta blood flow dissipates the medullary gradient. Alternatively, decreased blood flow reduces oxygen delivery to the nephron segments within the medulla.
What is the difference between peritubular capillaries and Vasa recta?
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.
How does blood enter and leave the kidney?
Blood flows into your kidneys through the renal artery and exits through the renal vein. Your ureter carries urine from the kidney to your bladder.
Where do the peritubular capillaries drain into?
As discussed previously, in the juxtamedullary nephrons, the peritubular capillaries form the ascending and descending vasa recta. The peritubular capillaries and vasa recta then drain into the interlobular vein, which unites with others to form the arcuate vein.
What is the Vasa recta blood vessels function?
The vasa recta capillaries are long, hairpin-shaped blood vessels that run parallel to the loops of Henle. The hairpin turns slow the rate of blood flow, which helps maintain the osmotic gradient required for water reabsorption.
Do peritubular capillaries have fenestrations?
Cortical peritubular capillaries are fenestrated, with large surface areas and high hydraulic conductivity. … Dilution of the interstitium in the vicinity of the capillary wall with protein-free fluid both lowers interstitial oncotic pressure and raises interstitial hydraulic pressure.