(1) What would be thelikely outcome if an increase in both intracellular sodium ionlevels and extracellular potassium ion levels were tooccur?
A: The Na+-K+ pump would accelerate because it needs to restorethe membrane's resting concentration gradient.
B: The Na+-K+ pump would slow down because it needs to restorethe membrane's concentration gradient.
C: Sodium and Potassium ions would be pumped out of thecell.
D: Sodium and Potassium ions would increase their movement inboth directions across the cell membrane.
(2) Due to the unequal transport of sodium and potassiumions by the Na-K pump, a membrane potential isgenerated.
True or False
(3) If a pump moves 3 positive ions out and 2 positiveions in against their concentration gradients, the membranepotential in the cell will become more positive.
True or False
(1) What would be thelikely outcome if an increase in both intracellular sodium ionlevels and extracellular potassium ion levels were tooccur?
A: The Na+-K+ pump would accelerate because it needs to restorethe membrane's resting concentration gradient.
B: The Na+-K+ pump would slow down because it needs to restorethe membrane's concentration gradient.
C: Sodium and Potassium ions would be pumped out of thecell.
D: Sodium and Potassium ions would increase their movement inboth directions across the cell membrane.
(2) Due to the unequal transport of sodium and potassiumions by the Na-K pump, a membrane potential isgenerated.
True or False
(3) If a pump moves 3 positive ions out and 2 positiveions in against their concentration gradients, the membranepotential in the cell will become more positive.
True or False
Related textbook solutions
Related questions
Cellular biology answer check. please check if my answers arecorrect or not.
1) The concentration of ions inside a cell is the same as theirconcentration outside of the cell. True or false? (i chose falsesince having equilibrium inside a cell is bad)
2) Membrane transport proteins...
| a)...transport membrane potentials between cells |
| b) | ...transport membranes from the ER to the Golgi |
| c) | ...are made up of phospholipids |
| d) | ...transport molecules across membranes |
i chose d
3)The electrochemical gradienttakes into account:
| a) | The concentration of solutes on either side of themembrane. |
| b) | The overall charge on either side of the membrane. |
| c) | Both of these. |
i chose C. (although i am sure that overall charge matters, Iwasn't sure if concentration of solutes are taken account.)
4) If no energywere expended by an animal cell:
| a) | Both gradients would be depleted |
| b)The K+ gradient would maintain itself. |
| c) | None of these |
| d) | The Na+ gradient would maintain itself. |
I chose d) mainly because I think Na+ gradient exist in animalcell and not K+ gradient.
5) Which of the following is a true statement aboutactin?
| a) | Once actin has polymerized, it never depolymerizes. |
| b) | Actin is a transmembrane protein. |
| c) | Actin can form branched networks. |
| d) | Actin filaments are organized into hollow tubes. |
I chose c. can't explain why.
6)Ion channels:
| a) | Form a hydrophobic channel through the membrane |
| b) | Have filters that let sugars through |
| c) | Are selective for particular ions (only the |
