THE KIDNEY'S NEPHRONS - Recap: An Overview of the Nephron...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Recap: An Overview of the Nephron Start Point: Renal Corpuscle: The renal Corpuscle is responsible for filtering blood that comes in via afferent arteriole. The filtered blood will then enter the efferent arteriole and get carried away from the Renal Corpuscle. As the blood is carried away via the efferent vessels, nutrients are reabsorbed via the tubules. Mid Point: Renal Tubules, more specifically the Ascending and Descending loop of Henle : The renal tubule is where absorption of nutrients occurs. This is the location where urine is produced (the urine making machine). End Point: Collecting Duct: Urine is collected here and send out from the nephrons to the bladder via the ureters. Some of the filtrate that is reabsorbed Completely Reabsorbed Glucose, Amino Acids, Bicarbonate ion Regulated and thus partially reabsorbed Water, Sodium, Potassium, Chloride Depends on how much of this material is present. If low amounts, none will be secreted. If quota has been met by the body, these items will be excreted. Excreted as Waste Urea, Creatine, drugs and drug metabolites Secretion and reabsorption occurs beyond the corpuscle in the renal tubule. The tubules The first part that the system reaches is the proximal convoluted tubule After this, the filtration reaches the loop of Henle.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The loop of Henle has two components, the descending and ascending component The descending component is permeable to water. The ascending component is impermeable to water but is able to push out Salt (NaCl). The distal convoluted tubule is the next location that filtrate reaches The distal convoluted tubule is right next to the renal corpuscle After the distal convoluted tubule, we reach the collecting duct The collecting duct is varying in permeability with respect to water. When we need to get rid of water, the permeability of the collecting duct is non-existent When we need to absorb water, the permeability is increased. The collecting ducts come together in the papilla and then drain into the pelvis The anatomical location of the nephron system The Renal corpuscle and the distal/proximal convoluted tubule are located in the cortex region of the kidney. The tubules and most of the collecting duct are within the renal medulla of the kidney. Where does the afferent arteriole originate from? The interlobular artery originating off of the Arcuate artery further divides into the afferent arteriole The efferent arteriole will travel across the entire nephron (loop of Henle and collecting duct). By travelling through the entire loop, it is able to reabsorb nutrients needed. The efferent arteriole connects with the venus system. All the efferent arterioles will eventually drain into the arcuate vein.
Background image of page 2
Reabsorption of Solutes and Water Reabsorption occurs either actively or passively The movement of water is by osmosis in both active and passive methods of reabsorption In the passive form, water simply moves along it’s concentration gradient. The 179L of water moves along it’s concentration gradient due to ions.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 11

THE KIDNEY'S NEPHRONS - Recap: An Overview of the Nephron...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online