- What is the difference between peritubular capillaries and Vasa recta?
- What do you mean by Vasa recta?
- What is the Vasa recta and where is it found?
- How is the proximal convoluted tubule different from the distal convoluted tubule quizlet?
- Why is Vasa recta absent in cortical nephron?
- What is the function of the Vasa recta?
- What does Peritubular mean?
- Where do kidneys lie?
- What is the countercurrent mechanism Why is it important?
- What is the function of peritubular capillaries quizlet?
- What hormone causes water to be reabsorbed back into the peritubular capillaries?
- What is the main function of the proximal convoluted tubule?
- What is the main function of the collecting ducts?
- What is the function of the proximal convoluted tubule quizlet?
- Do peritubular capillaries have fenestrations?
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..
What do you mean by Vasa recta?
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 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.
How is the proximal convoluted tubule different from the distal convoluted tubule quizlet?
The filtrate is produced within the proximal convoluted tubule. How is the proximal convoluted tubule different from the distal convoluted tubule? Water reabsorption is always obligatory in the proximal convoluted tubule but not in the distal convoluted tubule.
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. … This mechanism helps to maintain a concentration gradient in the medullary interstitium.
What is the function of the Vasa recta?
Vasa Recta Function Not only do the vasa recta bring nutrients and oxygen to the medullary nephron segments but, more importantly, they also remove the water and solute that is continuously added to the medullary interstitium by these nephron segments.
What does Peritubular mean?
Medical Definition of peritubular : being adjacent to or surrounding a tubule peritubular fibroblasts of the renal cortex— Deborah R.
Where do kidneys lie?
The kidneys lie retroperitoneally (behind the peritoneum) in the abdomen, either side of the vertebral column. They typically extend from T12 to L3, although the right kidney is often situated slightly lower due to the presence of the liver. Each kidney is approximately three vertebrae in length.
What is the countercurrent mechanism Why is it important?
The counter-current multiplier or the countercurrent mechanism is used to concentrate urine in the kidneys by the nephrons of the human excretory system. The nephrons involved in the formation of concentrated urine extend all the way from the cortex of the kidney to the medulla and are accompanied by vasa recta.
What is the function of peritubular capillaries quizlet?
eliminates waste, regulates blood volume and pressure, regulates osmolarity, secretes renin, secretes erythropoiten, helps with acid-base balance (pH), synthesizes calcitrol, and promotes gluconeogenesis. What is the difference between peritubular capillaries and the vasa recta?
What hormone causes water to be reabsorbed back into the peritubular capillaries?
Peritubular capillaries receive the solutes and water, returning them to the circulation. Cells of the DCT also recover Ca++ from the filtrate. Receptors for parathyroid hormone (PTH) are found in DCT cells and when bound to PTH, induce the insertion of calcium channels on their luminal surface.
What is the main function of the proximal convoluted tubule?
The function of the proximal tubule is essentially reabsorption of filtrate in accordance with the needs of homeostasis (equilibrium), whereas the distal part of the nephron and collecting duct are mainly concerned with the detailed regulation of water, electrolyte, and hydrogen-ion balance.
What is the main function of the collecting ducts?
The last part of a long, twisting tube that collects urine from the nephrons (cellular structures in the kidney that filter blood and form urine) and moves it into the renal pelvis and ureters. Also called renal collecting tubule.
What is the function of the proximal convoluted tubule quizlet?
What is the Proximal Convoluted Tubule? PCT – Functions in reabsorption and secretion. Confined to the cortex.
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.