Semester Ii Mini I Physio: Urea, Glucose, Aa, Po4, Ca

Front 1

Approximately 50% of the filtered urea is reabsorbed by the ____ tubule via ____ ____ and ___ mechanisms.

Back 1

proximal, transcellular, paracellular simple diffusion

Front 2

In the loop of henle, distal tubule and cortical collecting duct urea concentration _____.

Back 2

increases

Front 3

Urea concentration in the loop of henle increases because of _____ via _____ diffusion.

Back 3

secretion, facilitated (created by medullary collecting duct)

Front 4

Urea concentration in the distal tubule and collecting duct _____ due to ____.

Back 4

increases, urea impermeability and water reabsorption

Front 5

Cells of the ____ collecting duct are permeable to urea and favor _____.

Back 5

medullary, reabsorption

Front 6

The driving force for facilitated diffusion of urea into the loop of henle is created by ____.

Back 6

medula collecting ducts reabsorption of urea

Front 7

At very low flow rates where water reabsorption is ___, urea excretion is ___.

Back 7

high, high (BUN rises)

Front 8

Creatine unlike Urea is independent of ____ rate, and therefore BUN to creatine will be ____ during hemorrhage.

Back 8

flow, elevated

Front 9

Glucose reabsorption is coupled to ____ via the ______ on the apical membrane of the ____.

Back 9

Na, Na/glucose cotransporter (SGLT1 & 2), proximal tubule

Front 10

Non charged forms of weak acids and bases cross the epithelial membrane through ____.

Back 10

passive diffusion

Front 11

PTH ____ phosphate reabsorption by _____.

Back 11

inhibits, lowering transport maxima (endocytic removal of NaPi tranporters through phosphoryation by PKC and PKA)

Front 12

Vitamin D ____ phosphate reabsorption.

Back 12

stimulates (increases NaPi transporters)

Front 13

Ca is reabsorbed by paracellular mechanisms in the _____ tubule.

Back 13

proximal (positive lumen)

Front 14

Ca reabsorption in the thick ascending limb and distal tubule through _____ mechanism via ____ on the apical membrane.

Back 14

transcellular, ECaC, (basolateral Ca-ATPase and Na/Ca exchanger efflux)

Front 15

PTH and vitamin D ____ Ca reabsorption, by ____ and ____, respectively.

Back 15

increase, opening apical Ca-channels, Ca-binding protein that decreases ionic Ca favoring influx