Testosterone
Testosterone is a steroid sex hormone. It is a nongaseous signal molecule that is both hydorphobic and small [1].
In Males it is produced in the testicles and promotes male secondary sexual characteristics such as increased muscle growth.[2]
References
- ↑ Alberts, Johnson, Lewis, Raff, Roberts and Walter. (2008) 'Molecular Biology of the Cell' 5th Edition. New York: Garlands Science. p 889
- ↑ Page 17 The Reproductive System at a Glance By Linda J. Heffner, Danny J. Schust https://books.google.ca/books?id=_2yd2b8ybNoC&lpg=PA17&pg=PA17#v=onepage&q&f=false