BIOL 1003 Lecture Notes - Lecture 18: Penile Cancer, Spermatogonium, Hypothalamus
Document Summary
In the vagina only 12 hrs (too acidic) Fertilization can occur 5 days after copulation. *for sperm competition to occur, there must be a mating with a max gap of ~5 days. Seminal vesicles secrete fructose, main nutrient for sperm. Prostate gland produce an alkaline (basic) mucus that protects sperm from. Bulbourethral (cid:523)cowper"s(cid:524) glands produce pre-ejaculate fluid that neutralizes and lubricates the urethra acidity of vagina. *a typical ejaculate contains up to 300 million sperm. Testosterone causes development of male secondary sex characteristics including: Causes negative feedback on the production of lh & fsh. Circumcision foreskin is freed from head of penis (glans) Period of superficial healing is 5-7 days. Easier to keep penis and surround areas clean. Reduced risk of urinary tract infections in childhood. Prevention of inflammation of glans and foreskin. Reduced risk of some stds especially ulcerative diseases. Increased sensitivity of glans in first few months. Randomized trial study participants are randomly assigned to a.
