Testosterone Functions Inside a Cell by

Testosterone functions inside a cell by

A) acting as a signal receptor that activates tyrosine kinases.
B) binding with a receptor protein that enters the nucleus and activates specific genes.
C) acting as a steroid signal receptor that activates ion channel proteins.
D) becoming a second messenger that inhibits nitric oxide.
E) coordinating a phosphorylation cascade that increases spermatogenesis.