How Does ChR2 Activate Neurons

Multiple Choice

How does ChR2 activate neurons?

A) Blue light causes a conformational change in a rhodopsin protein which causes the channel to open. This results in a nonselective cation current that allows more Na⁺ influx than K⁺ efflux, depolarizing the neuron.
B) Blue light causes a conformational change in a rhodopsin protein which causes the channel to open. This results in a nonselective cation current that allows more K⁺ efflux than Na⁺ influx, depolarizing the neuron.
C) Blue light activates the rhodopsin protein that activates a G protein which opens a nonselective cation current which allows more Na⁺ influx than K⁺ efflux, depolarizing the neuron.
D) Blue light activates the rhodopsin protein that activates a G protein which opens a nonselective cation current which allows more Na⁺ influx than K⁺ efflux, hyperpolarizing the neuron.
E) Blue light activates the rhodopsin protein that activates a G protein which opens a nonselective cation current which allows more K⁺ efflux than Na⁺ influx, depolarizing the neuron.
F) Blue light activates the rhodopsin protein that activates a G protein which opens a nonselective cation current which allows more K⁺ efflux than Na⁺ influx, hyperpolarizing the neuron.