Testosterone

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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

  1. ↑ Alberts, Johnson, Lewis, Raff, Roberts and Walter. (2008) 'Molecular Biology of the Cell' 5th Edition. New York: Garlands Science. p 889
  2. ↑ Page 17 The Reproductive System at a Glance By Linda J. Heffner, Danny J. Schust
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