The Ascending limb of the loop of Henle
The Proximal Convoluted Tubule
The thick ascending limb of the nephron loop participates in active transport of salts, specifically sodium, potassium, and chloride ions. This segment plays a crucial role in establishing the high osmolarity in the medulla of the kidney, which is important for concentrating urine.
The tubular fluid has the highest osmolality in the medullary collecting duct as water reabsorption occurs in this segment, concentrating the solutes in the tubular fluid.
Arginine vasopressin (AVP), also known as vasopressin, argipressin or antidiuretic hormone (ADH), is a neurohypophysial hormone found in most mammals. Its two primary functions are to retain water in the body and to constrict blood vessels. Vasopressin regulates the body's retention of water by acting to increase water absorption in the collecting ducts of the kidney nephron. Vasopressin increases water permeability of the kidney's collecting duct and distal convoluted tubule by inducing translocation of aquaporin-CD water channels in the kidney nephron collecting duct plasma membrane. Vasopressin is a peptide hormone that controls the reabsorption of molecules in the tubules of the kidneys by affecting the tissue's permeability. It also increases peripheral vascular resistance, which in turn increases arterial blood pressure. It plays a key role in homeostasis, by the regulation of water, glucose, and salts in the blood. It is derived from a preprohormone precursor that is synthesized in the hypothalamus and stored in vesicles at the posterior pituitary. Most of it is stored in the posterior pituitary to be released into the bloodstream. However, some AVP may also be released directly into the brain, and accumulating evidence suggests it plays an important role in social behavior, bonding, and maternal responses to stress.
The portion of the nephron between the proximal and distal convoluted tubules is the Loop of Henle. This segment plays a crucial role in reabsorbing water and controlling the concentration of urine by creating a concentration gradient in the kidney medulla.
The distal convoluted tubule is the portion of the nephron that empties into the collecting ducts. It is the last segment of the nephron.
loop of Henle
The loop of Henle is the U-shaped segment of the nephron located in the kidney. It plays a key role in reabsorbing water and salts from the filtrate to maintain fluid balance in the body. The loop of Henle is composed of a descending and an ascending limb.
tubing made of selectively permeable membrane
The Proximal Convoluted Tubule
ADH makes the collecting duct & distal convoluted tubule of the nephron more permeable to water
ADH makes the collecting duct & distal convoluted tubule of the nephron more permeable to water
ADH makes the collecting duct & distal convoluted tubule of the nephron more permeable to water
The thick ascending limb of the nephron loop participates in active transport of salts, specifically sodium, potassium, and chloride ions. This segment plays a crucial role in establishing the high osmolarity in the medulla of the kidney, which is important for concentrating urine.
The tubular fluid has the highest osmolality in the medullary collecting duct as water reabsorption occurs in this segment, concentrating the solutes in the tubular fluid.
Nephron
the meaning of nephron