THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cell responding to its own chemical message
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Cell responding to a neighboring cell
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Cell responding to hormones circulating in the blood
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Cells responding to signals sent by direct contact
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Detailed explanation-1: -Autocrine signaling means the production and secretion of an extracellular mediator by a cell followed by the binding of that mediator to receptors on the same cell to initiate signal transduction. A well-characterized form of autocrine signaling is the secretion of IL-1 by macrophages.
Detailed explanation-2: -In biology, cell signaling (cell signalling in British English) or cell communication is the ability of a cell to receive, process, and transmit signals with its environment and with itself. Cell signaling is a fundamental property of all cellular life in prokaryotes and eukaryotes.
Detailed explanation-3: -Autocrine signalling is a type of cell communication, that occurs when the cell secretes a substance that is capable of provoking a reaction in itself. It comes from auto-, a Greek prefix meaning ‘self’. The secreted molecules are known as local mediators, because they only affect cells in their immediate vicinity.
Detailed explanation-4: -Autocrine signaling is a form of signaling in which a cell secretes a hormone, or chemical messenger (called the autocrine agent) that binds to autocrine receptors on the same cell, leading to changes in the cell. This can be contrasted with paracrine signaling, intracrine signaling, or classical endocrine signalling.