How long is the egg viable and capable of being fertilized after it is ovulated?
A) 12-24 hours
B) 24-36 hours
C) 36-72 hours
D) a full week
Answer: A) 12-24 hours
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Biology Chapter 28
- Select the correct statement about the special fetal blood vessels.
- The decidua basalis is ________.
- Which of the following is not usually considered a teratogen?
- Derivatives of the mesoderm include ________.
- Derivatives of the endoderm include ________.
- Which of the choices below occurs if fertilization of the ovum occurs and implantation takes place?
- Implantation of the blastocyst is the result of all of the following except ________.
- Cleavage as part of embryonic development is distinctive because it involves ________.
- Which of the following is true in reference to what may pass through the placental barriers?
- Sperm move to the uterine tube through uterine contractions and the energy of their own flagella. What other factor is involved in sperm movement?
- At which stage of labor is the "afterbirth" expelled?
- Which hormone is not produced by the placenta?
- During which stage of labor is the fetus delivered?
- Muscle tissue is formed by the ________.
- Neural tissue is formed by the ________.
- The trophoblast is mostly responsible for forming the ________.
- The cardiovascular system of a newborn must be adjusted after the infant takes its first breath. Which of the following is also true?
- Select the correct statement about fertilization.
- Shortly after implantation ________.
- The dorsal surface cells of the inner cell mass form ________.
- A premature separation of the placenta from the uterine wall is called ________.
- The correct sequence of preembryonic structures is ________.
- Which of the following is not assessed as part of the Apgar score?
- Hormones concerned with events of lactation include ________.