In an experiment (illustrated below) yellow dye was injected into a mature olfactory neuron and red dye was injected into an immature olfactory neuron. You observe that the yellow dye spreads to several other mature neurons.
Only the one immature neuron is labeled. The dye does not leak into the extracellular space. Following this experiment you conduct another identical experiment, except you incubate the tissue in carbenoxolone (which blocks connexin function) before injecting the dyes. In this second experiment, one mature and one immature neuron are labeled.
What is the most likely explanation for these observations?
Select ALL that apply.