BIO210Y5 Study Guide - Midterm Guide: Metaphase, Menstrual Cycle, Spermatid
Document Summary
Gonads: sperm & hormone production (sperm is transported to seminal glands where it mixes with semen and is later ejaculated) (when cold or during ejaculation is pulled closer together to bring sperm to ideal temperatures) Bulbourethral gland: secretes fluids for lubrication of penis tip (natural lube important in arousal and ejaculation during intercourse) Prostate gland: additional semen and antibiotic proteins (prostate gland is part of getting rid of urea) (when ejaculating prostate pinches urethra to prevent urine from passing through as well) (rectum and prostate share walls) Thoughts or stimulation ofsensory nerves in genital area > parasympathetic ns increases blood flow to penis > erection (corpal layers) > sympathetic activation begins peristaltic contractions of ampullae (pushes sperm out of the penis body) > semen enters urethra > somatic motor neurons control powerful rhythmic contractions (ejaculation) (parasympathetic ns releases nitric oxide with asodialates the blood vessels allowing more blood to go through stiffens the pp)
