HLTH 210 Lecture Notes - Lecture 3: Zona Pellucida, Acrosome Reaction, Seminiferous Tubule
23 Jan 2017
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Document Summary
Egg maturation: secondary oocyte (arrested at metaphase 2) is. Ovulation: oocyte is surrounded by granulosa cells and released into peritoneal cavity, oocyte is swept up by mbriae into the infundibulum of the uterine tubes, Estrogen: stimulates beating of cilia in the uterine tubes and uterine contractions. Fertile window: just before ovulation, cervical secretions are watery due to increased estrogen, mucous becomes more alkaline. Motorway mucous: watery mucous creates swimming lanes which only allow normal sperm/swimmers to enter the uterus. Infertile window: after ovulation, cervical mucous is sticky dry and acidic. Mesh mucous: thick impenetrable mucous, acidic, hostile to sperm. Sperm maturation: sperm are produced in the seminiferous tubules, but acquire mobility in the epididymis, must undergo capacitation in order to be capable of fertilizing an oocyte. Sperm movement: sperm move through meal reproductive tract into the female reproductive tract, movement is impeded by acidic environment, cervical mucous and uterine phagocytic leukocytes.
