An autocrine is: Select one: O a. An autocrine is a chemical signal released intra-cellularly, designed to influence gene expression directly O b. A chemical signal secreted by a cell that is designed to bind to cell membrane receptors on adjacent cells A chemical signal secreted by a cell that binds to cell membrane receptors on that same cell 0 с. O d. A chemical signal secreted by a cell that acts both locally and as a hormone O e. All of the others are correct

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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.