<prompt> Which of the following best describes the permeability to sodium and potassium in rod cells in response to the light?Decreased sodium permeability, decreased potassium permeabilityDecreased sodium permeability, increased potassium permeabilityDecreased sodium permeability, no change in potassium permeabilityIncreased sodium permeability, decreased potassium permeability  <response>: Activated rhodopsin metarhodopsin II closes cGMP-gated sodium channels by lowering levels of cGMP; this action decreases sodium permeability. Potassium permeability is not affected. 