Put these events of the sodium-potassium pump cycle in the correct chronological

Question

Put these events of the sodium-potassium pump cycle in the correct chronological order, starting with an unbound pump facing the intracellular surface. Some events may not be used, not all events may be included as choices. Just make sure you do get the correct events in the correct order. Event #1 Event #2 Event #3 Event #4 Event #5 a) ATP is anabolized b) GTP is hydrolyzed c) potassium ions are released into the intracellular fluid d) potassium ions bind the pump on the intracellular surface e) potassium ions move down their concentration gradient f) sodium ions bind the pump on the intracellular surface g) sodium ions are released into the intracellular fluid h) sodium moves down its concentration gradient i) the pump is dephopshorylated j) the pump is phosphorylated k) the pump undergoes a conformational change to face the intracellular fluid Which of the following statements could be true of a cell that is filled with sodium leak channels instead of potassium leak channels? a) The membrane is more permeable to cations than a cell that contains potassium leak channels. b) There would be more sodium outside of the cell than inside of the cell. c) The resting membrane potential would be closer the equilibrium potential for sodium. d) Since both are positively charged, it would have no impact on resting membrane potential. Below you'll see a list of molecules along with their basic chemical properties. For each molecule, determine the type transport that it would use to get across the membrane to move down its concentration gradient. O_2 (oxygen gas) sodium ion (small charged molecule) testosterone (small non-polar molecule) a) active transport b) facilitated diffusion c) simple/passive diffusion

Explanation / Answer

1.

b) GTP is hydrolysed

j) the pump is phosphorylated

k) the pump undergoes a conformational change to face the intracellular fluid

f) sodium ions bind the pump on the intracellular surface

h) sodium moves down its concentration gradient

g) sodium ions are released into the intracellular fluid

d) potassium ions bind to the pump on the intracellular surface

a) ATP is anabolized

i) the pump is dephosphorylated

e) potassium ions moves down its concentration gradient

c) potassium ions are released into the intracellular fluid

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