Synthesis Writing. Although at its most basic level a synthesis involves combining two or more summaries, synthesis writing is more difficult than it might at first appear because this combining must be done in a meaningful way and the final essay must generally be thesis-driven.
1. Endocrine Diseases. The bodyâs endocrine system produces hormones that regulate metabolism, sexual function, reproduction, mood, and much more. Diabetes is an example of an endocrine disease that can cause men to experience impotence. Diabetes affects the bodyâs ability to utilize the hormone insulin.
Erectile dysfunction, also called impotence, is the inability to develop or sustain an erection satisfactory for sexual intercourse. Though prostate cancer is not a cause of erectile dysfunction, treatments for the disease can cause the problem. These include: 1  Surgery to remove the entire prostate gland.  Radiation therapy, whether by external beam or radioactive seed implants.