Vasa

What is the Difference Between Vasa Recta and Peritubular Capillaries

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.

  1. What are Vasa recta?
  2. What is the role of vasa recta capillaries?
  3. What blood vessel do the peritubular capillaries and the Vasa recta arise from?
  4. What is the difference between Juxtamedullary and cortical nephron?
  5. What is the Vasa recta and where is it found?
  6. Where do the Vasa recta drain?
  7. Why is Vasa recta absent in cortical nephron?
  8. What is the function of the Vasa recta quizlet?
  9. Do kidneys have capillaries?
  10. What is the main function of peritubular capillaries?
  11. Do peritubular capillaries have fenestrations?
  12. What hormone causes water to be reabsorbed back into the peritubular capillaries?

What are Vasa recta?

The vasa recta, the capillary networks that supply blood to the medulla, are highly permeable to solute and water. ... The ability of the vasa recta to maintain the medullary interstitial gradient is flow dependent. A substantial increase in vasa recta blood flow dissipates the medullary gradient.

What is the role of vasa recta capillaries?

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. Illustration of the vasa recta which run alongside nephrons.

What blood vessel do the peritubular capillaries and the Vasa recta arise from?

The efferent arteriole is the connecting vessel between the glomerulus and the peritubular capillaries and vasa recta.

What is the difference between Juxtamedullary and cortical nephron?

The major difference between cortical nephrons and juxtamedullary nephrons are the length of the loops of Henle. In cortical nephrons, the glomeruli, proximal and distal convoluting ducts, and loops of Henle stay limited to the cortex. In juxtamedullary nephrons, they extend into the medulla.

What is the Vasa recta and where is it found?

In the blood supply of the kidney, the vasa recta renis (or straight arteries of kidney, or straight arterioles of kidney) form a series of straight capillaries in the medulla. They lie parallel to the loop of Henle.

Where do the Vasa recta drain?

Efferent arteries that arise from glomeruli near the medulla give rise to arterial vasa recta (spuria) through which the medulla receives most of its blood supply. Arterial vasa recta turn back into venous vasa recta that drain into arcuate veins at the corticomedullary junction.

Why is Vasa recta absent in cortical nephron?

The proximity between the Henle's loop and vasa recta, as well as the counter current in them help in maintaining an increasing osmolarity towards the inner medullary interstitium. This gradient is mainly caused by NaCl and urea.

What is the function of the Vasa recta quizlet?

What is the function of the vasa recta? It maintains the concentration gradient established by the loop of Henle.

Do kidneys have capillaries?

Overview of Kidney Function and Structure

The renal circulation is unusual in that it breaks into two separate capillary beds: the glomerular bed and the peritubular bed. These two capillary networks are arranged in series, so that all of the renal blood flow passes through both.

What is the main function of peritubular capillaries?

In the renal system, peritubular capillaries are tiny blood vessels, supplied by the efferent arteriole, that travel alongside nephrons allowing reabsorption and secretion between blood and the inner lumen of the nephron.

Do peritubular capillaries have fenestrations?

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.

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.

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