BMS 460 Study Guide - Quiz Guide: Paraphimosis, Epididymitis, Foreskin
26 Apr 2014
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Document Summary
Follicle-stimulating hormone and testosterone are needed for spermatogenesis. Manifestations of t deficiency vary with time of onset. A variety of toxicants/environmental factors target different phases of spermatogenesis. Radiation and chemotherapeutic drugs block mitosis or may cause mutations. Small adverse effects here can cause a large reduction in the sperm count. Exposure to a range of environmental factors (chemicals/heat) can destroy some spermatocytes. A normal man produces >100 million sperm every day. Most environmental factors which impair spermatogenesis also inhibit normal sperm release; e. g. , water disinfection by-products. By systematic collection of seminal ejaculates, one can identify the interval between a detrimental event and a decline in sperm output. In epididymis sperm maturation, acquire ability to move and fertilize. Seminal vesicle fluid rich in fructose; 60% of ejaculate. Prostate gland fluid rich in citrate and other electrolytes; 30% of ejaculate. Bulbourethral gland fluid rich in mucus; 5% of ejaculate. Sympathetic, parasympathetic, and somatic nerves contribute to the male sexual response.
