The presence of specific receptors for the hormone on the cell membrane
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Understand that hormones are chemical messengers that travel through the bloodstream to reach various parts of the body.
Recognize that not all cells respond to every hormone; only target cells with specific receptors for a hormone can respond to it.
Learn that these receptors are typically proteins located on the cell membrane or inside the cell, which bind to the hormone.
Explore how the binding of a hormone to its receptor triggers a series of cellular responses, leading to changes in cell function.
Consider that the presence of specific receptors is what makes a cell a target cell for a particular hormone, not its location, ability to produce the hormone, or its size and shape.