The options are missing from the question,below are the options.
A) touch
B) smell
C) hearing
D) sight
The correct answer to the question is option D
SIGHT.
If one is experiencing Na channels deactivating the plasma membrane,the sense that is being activated is SIGHT,
this is because in the red blood cell,the light induced isomerization of the moiety retinal rhodoesin produce activated opsin which goes ahead to activate the signal transducing G-protein transducin,this it does by catalyzing exchange of GTP (Guanosine triphosphate) for bound GDP(guanosine diphosphate) on the subunit.
This GTP in turn activates the level of CGMP (Cyclic guanosine monophosphate) phosphodiesterase and it further acts to lower the level of CGMP.
Upon this reduction,it leads to the closing of CGMP-gated Na+ channels and hyperpolarization of the membrane.
