are substances produced by glands and released into the bloodstream
that affect activity in cells at other locations of the body.
Hormones bind to receptors on a cell's surface or inside a
cell. The binding of a hormone to a receptor speeds up, slows
down, or in some other way alters the cell's function.
can be either a protein or a steroid.
hormones bind with receptors on the surface
hormones are small molecules that are fat-soluble
and thus easily diffuse through cell walls to bind with
receptors inside of cells.