What is the difference between the cortical and Juxtamedullary nephrons?
Cortical nephrons have a glomerulus located nearer to the outer parts of the cortex and their loops of Henle are short. Juxtamedullary nephrons have a glomerulus near the junction of the cortex and medulla and their loops of Henle penetrate deep into the medulla.
Where are Juxtamedullary nephrons found?
The nephron is made up of the renal corpuscle and renal tubule. Cortical nephrons are found in the renal cortex, while juxtamedullary nephrons are found in the renal cortex close to the renal medulla. The nephron filters and exchanges water and solutes with two sets of blood vessels and the tissue fluid in the kidneys.
What is the role of cortical vs Juxtamedullary nephrons?
Cortical nephrons are mainly involved in the excretory and regulatory functions of the body while juxtamedullary nephrons concentrate or dilute urine. Thus, the main difference between cortical nephron and juxtamedullary nephron is their structure and function.
What’s the function of a juxtamedullary nephron?
Although both cortical and juxtamedullary nephrons regulate the concentrations of solutes and water in the blood, countercurrent multiplication in the loops of Henle of juxtamedullary nephrons is largely responsible for developing the osmotic gradients that are needed to concentrate urine.
Are there Vasa recta in cortical nephron?
In the renal tubules of the cortical nephrons occurs reabsorption. Most of the water, ions, amino acids and glucose are reabsorbed through a vascular network situated around the loop of Henle, called vasa recta. As a result of the short loop of Henle, the vasa recta in the cortical nephrons is also small.
Why do Juxtamedullary nephrons produce more concentrated urine?
The bigger size of the glomeruli increases the filtration rate of the juxtamedullary nephrons, compared to the cortical ones. The long loop of Henle is surrounded by a large vasa recta network. Depending on the quantity of water, absorbed by the vasa recta the produced urine is more concentrated or diluted.
How much amount of urine is filtered by kidney in each day?
Their main job is to cleanse the blood of toxins and transform the waste into urine. Each kidney weighs about 160 grams and gets rid of between one and one-and-a-half litres of urine per day. The two kidneys together filter 200 litres of fluid every 24 hours.
Are there vasa recta in cortical nephron?
What is the role of cortical nephrons?
Cortical nephrons (85% of all nephrons) mainly perform excretory and regulatory functions, while juxtamedullary nephrons (15% of nephrons) concentrate and dilute urine.
What is Vasa recta in nephron?
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.
Is vasa recta absent in Juxtamedullary nephron?
Reason: Cortical nephrons are mainly concerned with concentration of urine. “Assertion: Vasa recta is absent or highly reduced in cortical nephrons.