Question

Estrogen, a hormone, is released by the ovaries. Once released, it travels to cells where it has an influence on sexual development. In order for estrogen to achieve its purpose, it must?
(A)- Travel through the cell membrane and bond to an intracellular receptor inside.


(B)- Bind to a membrane receptor on the cell's surface


(C)- Estrogen does not need to cross the cell membrane to get to the nucleus


(D)- Travel using a transport protein to cross the cell membrane

Answer 1

Ovaries produce and release two groups of sex hormones—progesterone and estrogen. There are actually three major estrogens, known as estradiol, estrone, and estriol. These substances work together to promote the healthy development of female sex characteristics during puberty and to ensure fertility.

i would say that the answer is ( A )