Steroid Hormones
Steroid hormones are a type of hormone that is derived from cholesterol. They are lipid-soluble, which means they can easily pass through the cell membrane and enter the cell. Steroid hormones are produced by the adrenal gland, gonads, and placenta. They have a wide range of functions in the body, including regulating metabolism, immune response, and reproduction.

Estrogen as a Steroid Hormone
Estrogen is a female sex hormone that is produced mainly by the ovaries. It is a steroid hormone that is responsible for the development of female sex characteristics, such as breast growth, widening of the hips, and the growth of pubic and underarm hair. Estrogen also plays a role in regulating the menstrual cycle, bone density, and cholesterol levels.

Other Hormones
Epinephrine, also known as adrenaline, is a hormone produced by the adrenal gland. It is a non-steroid hormone that is responsible for the "fight or flight" response in the body. Thyroxine is a hormone produced by the thyroid gland. It is also a non-steroid hormone that is responsible for regulating metabolism. Gonadotropin is a hormone produced by the pituitary gland. It is a non-steroid hormone that plays a role in regulating the reproductive system.

Conclusion
In conclusion, estrogen is a steroid hormone that is responsible for the development of female sex characteristics and plays a role in regulating various bodily functions. Epinephrine, thyroxine, and gonadotropin are non-steroid hormones that regulate the "fight or flight" response, metabolism, and the reproductive system, respectively.