Potassium Ion Electrochemical Gradient
A cell has an internal K+ concentration of 140 mM and is placed in a solution with an external K+ concentration of 5 mM. If the cell’s membrane potential is -70 mV, which of the following statements correctly describes the net movement of K+ ions?
A
K+ movement will require ATP hydrolysis in both directions
B
K+ will not move as it is already at electrochemical equilibrium
C
K+ will passively exit until electrochemical equilibrium is reached
D
K+ will actively enter the cell against its concentration gradient
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | rehanfatih56 | 1 | 1 | 0m 31s | 69 |
| #2 | angelarosechavez | 1 | 1 | 0m 50s | 50 |
| #3 | kebrusum | 1 | 1 | 1m 13s | 27 |
| #4 | sakaur | 0 | 1 | 0m 00s | -10 |
| #5 | kmariaclaire | 0 | 2 | 0m 00s | -20 |
| #6 | happyamy2009 | 0 | 1 | 0m 30s | -40 |
| #7 | vsa476022 | 0 | 1 | 1m 11s | -81 |
| #8 | eva.e.morrison | 0 | 1 | 1m 28s | -98 |
| #9 | erickim9181 | 1 | 2 | 1h 33m | -5,515 |
Items per page:
10
1 – 9 of 9