Why do hormones in the bloodstream only attach to certain cells?

Question

It's for biology. I never actually learned this and we have a test on it today. Help appreciated :].

Answer 1

Hormones bind to receptor either on the cell surface or intracellularly. The hormone and receptors are like a lock and key mechanism. The hormone cannot bind to other receptors than the one it was intended for and the receptor cannot bind to other hormones. Once the hormone finds the receptor and binds to it, there is a conformational change that occurs in the hormone-receptor complex. This change then triggers other event inside the cell to take place. Most protein hormones have a receptor embedded in the cell membrane of its target cell(s). Steroid hormones tend to diffuse into the cell and bind intracellularly to its receptor on the effector cell(s).

Answer 2

A particular hormone will have a particular shape which will only fit into a particular binding site. These binding sites are found on the cells. Different specialised cells in the body will have different binding sites. Therefore a particular hormaone will only effect target cells.

Answer 3

I truthfully have the same condition and that's what my medical doctors (at homestead and in England) advised me: avert white bread and all wheat flour products shrink down on sugar as a lot as conceivable avert ingesting fruit juice workout devour 3 food an afternoon, somewhat breakfast to keep sugar ranges down good success!

Answer 4

Because such cells have the binding site for such hormones.just as a particular bolt can only fit into a hole of his size.