The net force driving a charged molecule across the plasma membrane by passive transport is:
(a) concentration gradient
(b) charge of the molecule
(c) membrane potential
(d) more than one is correct

D

Explanation:

Passive transport:

 When movement of ions occurs with out use of any input energy then it is called passive transport.The example of passive transport are as diffusion ,filtration and osmosis.

Passive transport depends on permeability of the cell  membrane.

Passive transport depends on

1.Membrane potential

2.concentration gradient

3.Charge of the molecule

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i think its white blood cells

i hope this