Thin and thick segements of limbs Flashcards
The thins segments are freely permeable to ___and not___
- to water
-not to solutes
Water movement helps concentrate
Tubular fluid
The thick ascending limb ends at a sharp angle near the ____. This is where___begins
-Renal corpuscle
-DCT begins
The DCT is located on what segment of the renal tubule?
Third segment
Where does the initial portion of the DCT pass
Between afferent and efferent arterioles
Where does the initial portion of the DCT pass
Between afferent and efferent arterioles
Which has a smaller diameter PCT or DCT
DCT
What do the epilthelial cells of DCT lack?
Microvili
What are the 3 processes at the DCT
- Active secretion of ions, acids, drugs, and txins
- Selective reabsorption of sodium and calcium ions fromm tubular fluid
- Selective reabsoprtion of water
- Concentrates tubular fluid
The Juxtaglomerular complex (JGC) is an endocrine structure that secretes what?
- The hormone erthropoietin
- Enzyme renin (also released by sympathic stimulation)
What is the JGC formed by?
Macula densa
- juxtaglomerular cells
Macula densa contains what cells
- Epithelial cells of DCT, near renal corpuscle
-Taller cells with densley clustered nuclei
Juxtaglomerular cells are what muscle fiber in wall of afferent arterioles? Which cells are they assosciated with? What does it form with macula densa?
- Smoot muscle fibers
cells of macula densa - together with macula densa forms JGC
Where does the distal convoluted tubule open into
the collecting system
Where do individula nephrons drain into
a nearby collecting duct which empties into a minor calyx
