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30 Cards in this Set
- Front
- Back
Fertilization of the ovum usually occurs
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in the upper 1/3 of the uterine tube
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Sperm cannot fertilize an egg until they
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undergo capacitation
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All of the following are true during oocyte activation except
a. the metabolic rate of the oocyte increases b. the ovum completes meiosis II c. other sperm are prohibited from fertilizing the egg d. the ovum begins mitosis |
d. the ovum begins mitosis
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The period of gestation that is characterized by rapid fetal growth is the ________ trimester.
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third
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The period of gestation when the rudiments of all major organ systems appear is the ______ trimester
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first
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The period of gestation when organs and organ systems complete most of their development and the fetus looks distinctly human is the _______ trimester.
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second
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The process of cell division that occurs after fertilization is called
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clevage
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The penetration of the endometrium by the blastocyst is referred to as
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implantation
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The solid ball of cells that is formed after several rounds of cell division following fertilization is called a
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morula
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The inner cell mass of the blastocyst will
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form the embryo
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During implantation the
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syncytial trophoblast erodes a path through the endometrium
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Under the influence of the trophoblast, maternal blood vessels in the endometrium
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break down to form lacunae
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Separation of the inner cell mass from the trophoblast forms the
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amniotic cavity
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During gastrulation
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germ layers are formed
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The ectoderm forms
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neural tissues
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The mesoderm forms
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muscle
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The chorionic villi
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increase the surface area available for exchange between the placenta and the maternal blood
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The endoderm forms the
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lining of the digestive tract
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The extraembryonic membrane that forms a fluid-filled sac is the
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amnion
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The hormone that is the basis for the pregnancy test is
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hCG
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Each of the following hormones is produced by the placenta except
a. human chorionic gonadotropin b. human placental lactogen c. relaxin d. LH |
d. LH
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All of the following occur during pregnancy except
a. a woman's respiratory rate and tidal volume increase b. maternal blood volume increases c. maternal nutrient requirements increase d. a woman's heart rate increases |
d. a woman's heart rate increases
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During gestation, powerful uterine contractions are suppressed by elevated levels of
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progesterone
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The first stage of labor is the ________ stage.
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dialation
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The stage of labor during which the fetus emerges from the vagina is called the _____ stage.
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expulsion
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All of the following occur at puberty, except
a. FSH levels rise b. LH levels decline c. gametogenesis begins d. secondary sexual characteristics begin to become apparent |
b. LH levels decline
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If a sperm cell lacked sufficient quantities of hyaluronidase it would not be able to
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penetrate the corona radiata
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Problems involving the formation of the chorion would affect
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the embryo's ability to derive nutrition from the mother
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Stretching of the cervix would cause an increase in the blood levels of
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oxytocin
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An inability of the placenta to produce sufficient amount of relaxin would dictate
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that a caesarian should be performed
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