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Lesson 15.4 Review and Assessment
Know and Understand
Describe what occurs during capacitation.
When is the second meiotic division of the oocyte complete, and what is the result?
How is sperm able to penetrate the zona pellucida of the oocyte?
What is polyspermy and how is it prevented?
How is menstruation prevented once a blastocyst has successfully implanted in the endometrium?
What is human chorionic gonadotropin hormone, and where does it come from?
Which hormones are secreted by the placenta?
How do the embryo and, later, the fetus receive oxygen and nutrients, and how do they expel carbon dioxide and waste?
What does breast milk contain that makes it a uniquely important source of nutrition for the developing infant?
What is the let-down reflex?
Analyze and Apply
How is childbirth—in particular, the roles of fetal and maternal oxytocin—an example of a positive feedback system?
You are a doctor with a patient who is reluctant to breast-feed her newborn infant. What would you say to convince her of the benefits of breast feeding?
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