The renal tubule Flashcards
What are three components of the renal tubule?
Proximal convoluted tubule
The loop of Henle
Distal convoluted tubule
Describe the proximal part of the renal tubule
highly coiled
Where is the renal tubule present?
In the renal cortex
What does the renal cortex do?
Reabsorbs water and all the useful salts, amino acids and glucose
What products are not absorbed from the renal cortex and where do they go?
Waste products such as Urea, uric acid and creatinine are not reabsorbed
continue down the renal tubule for excretion.
What does the loop of Henle create?
an area of high urea concentration deep in the medulla, near the papillary duct in the collecting duct
What does Water present in the filtrate in the papillary duct do?
flows through aquaporin channels out of the duct, moving passively down its concentration gradient
What does the process of moving down its concentration gradient then do?
reabsorbs water and creates a concentratedurine excretion.
Describe the thick ascending loop of Henle
major resorptive segment of the nephron
and accounts for resorption of nearly a quarter of the filtered load of sodium, chloride, and potassium ions.
What is the distal convoluted tubule primarily responsible for?
adjustments in Na+ and H20 reabsorption and potassium secretion.
What are the intercalated cells of the distal convoluted tubule responsible for?
for H+ and HCO3- secretion as well as K+ reabsorption. Actively reabsorbs Na+Some Cl- by diffusion.
What does the Distal convoluted tubule secrete
harmful substances such as urea and uric acid from the blood into the nephric filtrate by the cells of DCT.
