Steroid Hormones _______

Question

Steroid hormones _______.
A) use calcium ions as second messengers
B) use cAMP as second messengers
C) activate G proteins in the cell membrane
D) turn specific genes on or off

Accepted Answer

Steroid hormones are lipid soluble, allowing them to pass through the plasma membrane and bind to hormone receptors in the cytoplasm or nucleus. This binding then affects gene expression, leading to the activation or repression of specific genes, ultimately causing changes in the cell's behavior. Steroid hormones do not use second messengers such as calcium ions or cAMP, nor do they activate G proteins on the cell membrane.