Multiple Choice
What is the stoichiometry of the NCKX transport system?
A) One calcium and one potassium ion outward for every four sodium ions entering the cell (4 Na+:1 Ca2+:1K+)
B) Three potassium ions outward for every three sodium ions and one calcium entering the cell (3 Na+:1 Ca2+:3K+)
C) Two calcium ions outward for every two protons and one potassium entering the cell (2 H+:2 Ca2+:1K+)
D) One ion X outward for every one sodium, one potassium and one calcium ions entering the cell (1Na+:1 Ca2+:1K+:1 X)
E) Na+, K+ and Ca2+ are not transported in a fixed ratio through the NCX transport system
Correct Answer:
Verified
Correct Answer:
Verified
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