Some Hormones,like Thyroxine,affect Most or All Body Cells,while Others Only

question 89

Multiple Choice

Some hormones,like thyroxine,affect most or all body cells,while others only affect a single organ or type of cell.This is because of variations in

• A) hormone concentration-when present in high concentration, a hormone can stimulate a greater number of body locations.
• B) receptor distribution-all cells or organs with receptors for the hormone will be affected.
• C) membrane permeability-hydrophobic hormones enter and affect all cells, whereas hydrophilic hormones have more limited affects.
• D) signal transduction-only cells with the appropriate enzymes needed to activate the hormone will respond to its signal.

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Definitions:

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