The penis is a highly vascularized organ, and erections are primarily vascular events.11 Sexual stimulation causes the release of neurotransmitters from the corpus cavernosa (the two cylindrical chambers that run the length of the penis) and a relaxing factor, now establ...
The MMP9 and CTSO (Cathepsin K) genes, both coding for proteases responsible for degradation of bone extracellular matrix, underwent about twofold increase of mRNA expression. The non-significant variation of the OSCAR gene, coding for an osteoclastic collagen receptor, was not surprising because ...