Question

Which of the following hormone does not require secondary messenger for their action? a) Gonadotropins
b)STH
c)Epinephrine
d)Triiodothyronine​

Answer 1

Triiodothyronine​ hormone does not require secondary messenger for their action.

• Hormones cast their effect on the target tissue by binding to the specific receptor and forming a hormone-receptor complex.
• The receptors may be intercellular (i.e. located inside the cell) or extracellular (i.e. located outside the cell)
• Hormones that bind to intercellular targets do not require a secondary messenger for their action.
• Examples of such hormones are triiodothyronine, steroid hormones, etc