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 adenylyl cyclase.
E) coordinating a phosphorylation cascade that increases spermatogenesis.

Question

Quizplus · Accepted Answer

Testosterone is a steroid hormone that interacts with intracellular receptors. The steroid-receptor complex enters the nucleus and binds to specific DNA sequences, activating the transcription of specific genes. This stimulation of gene expression leads to the physiological effects associated with testosterone, such as promotion of male sexual characteristics, and increased muscle mass and bone density.

Testosterone Functions Inside a Cell by