Sperm generally can only enter the uterus from the vagina around the time of ovulation because… a) When oestrogens are elevated, the mucus in the cervix becomes non viscous allowing sperm penetration b) Elevated progesterone levels open the cervix allowing the sperm to enter c) The mucus in the cervix is normally thick and viscous allowing sperm to swim into the uterus d) The LH surge opens the cervix allowing the sperm to enter

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Sperm generally can only enter the uterus from the vagina around the time of ovulation because…
  a)   When oestrogens are elevated, the mucus in the cervix becomes non viscous allowing sperm penetration
  b)   Elevated progesterone levels open the cervix allowing the sperm to enter
  c)   The mucus in the cervix is normally thick and viscous allowing sperm to swim into the uterus
  d)   The LH surge opens the cervix allowing the sperm to enter

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