You attempt to generate an IV plot for GABA channels in cultured neurons. You apply pentobarbital and perform voltage steps but see no current at any voltage. Which of the following would explain your findings?     Concentration of pentobarbital is too low       GABA is not present in your solutions       Cl- concentration is equal on both sides of the membrane       None of the above

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Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.