Flashcards in M&R Session 2- Ion Trasnporters And Exchangers Deck (8)
What does the sodium potassium pump do?
It extrudes 3 sodium ions and imports 2 potassium ions.
It uses ATP to do this.
What four transporters control intracellular calcium levels?
-NCX- imports 3 sodium ions and extrudes 2 calcium ions
-PMCA- extrudes a calcium ion using ATP.
-mitochondrial calcium uniporter- imports calcium into mitochondria when intracellular calcium levels are very high.
-SERCA- imports one calcium into the SR in exchange for one hydrogen ions out.
Which transporter involved in calcium ion regulation has a low affinity but high capacity?
Which 3 transporters control cellular pH?
-NHE- one sodium ion moves in and one hydrogen ion moves out.
-NBC- one sodium and one HCO3- move in and one H+ and one Cl- move out.
-anion exchanger- HCO3- moves out and Cl- moves in.
How does a sodium, glucose co-transporter work?
It is a symporter. The energy generated when sodium moves in allows glucose to be moved in against the concentration gradient.
How is cell swelling resisted?
Efflux of ions
How is cell shrinkage resisted?
Influx of ions