Which of the following is/are TRUE? (Select ALL that apply.) Question 2 options:

Question

Which of the following is/are TRUE? (Select ALL that apply.)

Question 2 options:

a)

In a membrane at resting potential, there is no net flow of potassium out of the cell because the potassium leak channels are closed and unable to pass K+.

b)

The Na+ - K+ ATPase uses the energy stored in the Na+ gradient across the membrane to bring K+ ions into the cell.

c)

Red blood cells placed in distilled water (which has no dissolved solutes) burst because water can enter the cell directly through the lipid bilayer, and will move from the outside of the cell to the hypertonic environment of the cell cytosol.

d)

At resting potential, there is an equal distribution of charge across the plasma membrane of a neuron.

e)

Osmosis is the process by which ions move passively down a concentration gradient.

a)

In a membrane at resting potential, there is no net flow of potassium out of the cell because the potassium leak channels are closed and unable to pass K+.

b)

The Na+ - K+ ATPase uses the energy stored in the Na+ gradient across the membrane to bring K+ ions into the cell.

c)

Red blood cells placed in distilled water (which has no dissolved solutes) burst because water can enter the cell directly through the lipid bilayer, and will move from the outside of the cell to the hypertonic environment of the cell cytosol.

d)

At resting potential, there is an equal distribution of charge across the plasma membrane of a neuron.

e)

Osmosis is the process by which ions move passively down a concentration gradient.

Explanation / Answer

a) TRUE

At resting membrane potential potassium channels are closed

B) FALSE

Na+ - K+ ATPase uses the energy of ATP hydrolysis

c) TRUE

RBC hemolysis, osmotic movement of water to inside of RBC leads to bursting of cell

d) FALSE

At resting potential, there is an unequal distribution of charge across the plasma membrane of a neuron

e) FALSE

Osmosis means movement of water not the movement of ions

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