4.4_1 Renal I Part II Flashcards
In a normal capillary bed, _____ is high pushing out
HP
OP
In a peritubular capillary, _____ is very low
HP
What does the low HP in peritubular capillaries yield?
Net reabsorption of water
OP is a stronger force in peritubular capillaries because of..
Proteins
~_____ % of filtrate is immediately captured from the filtrate
65
~___% of Na+ ion reabsorption occurs in the proximal tubule via __________ using the ________
65
Primary active transport
Na+ / K+ ATPase
Most other ions (Cl-, K+, Ca2+, Mg2+, Pi) are absorbed from the proximal tubule via _______ or _______
Facilitated diffusion
Secondary active transport
Glucose and amino acids are reabsorbed by ….
Carrier mediated secondary active transport with Na+ ions
Na+ transport across luminal or apical membrane is ______
Passive (facilitated diffusion)
Na+ transport across the basolateral membrane is…
Active (ATPase pump) creates a low intracellular [Na]
The luminal membrane is closer to / touching the…
Tubular fluid
The basolateral membrane is closer to / touching…
Interstitial fluid
Glucose and amino acids are transported by what process across the luminal membrane?
Secondary active transport (supporter proteins, use Na+ gradient)
Glucose and amino acids cross the basolateral membrane via..
Facilitated diffusion
Maximum tubular transport
Carrier proteins like the Na / Glucose supporter can saturate if the maximum transport capacity (tubular maximum) is exceeded
