Chapter 24: Development Flashcards
The change in a sperm that allows it to fertilize an egg is known as…
a. vasocongestion
b. capacitation
c. cleavage
d. gestation
e. meiosis
b. capacitation
Match the following with the right name
……….: early division of the zygote that increases the cell number but not size
cleavage
Match the following with the right name
……….: solid mass of cells three to four days following fertilization
morula
Match the following with the right name
……….: a hollow ball of cells found in the uterine cavity about five days after fertilization
blastocyst
Match the following with the right name
……….: portion of the blastocyst that develops into the embryo
inner cell mass
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……….: portion of the blastocyst that forms the fetal portion of the placenta
trophoblast
Match the following with the right name
……….: results from fertilization of the sperm and egg
zygote
The principal hormone in promoting milk production is…
a. relaxin
b. prolactin
c. oxytocin
d. cortisol
e. human chorionic gonadotropin (hCG)
b. prolactin
The placental hormone that appears to affect the timing of birth is…
a. cortisol
b. human placental lactogen (hPL)
c. relaxin
d. corticotropin-releasing hormone (CRH)
e. human chorionic gonadotropin (hCG)
d. corticotropin-releasing hormone (CRH)
Most of the major body systems in the fetus begin development…
a. during the first week
b. during the 16th week
c. during the fourth through eighth weeks
d. while cleavage occurs
e. as part of gastrulation
c. during the fourth through eighth weeks
Fingerlike projections containing fetal blood vessels…
a. are chorionic villi
b. become umbilical veins
c. are part of the notochord
d. develop into morulas
e. emerge from the zona pellucida
a. are chorionic villi
The hormone that causes a home pregnancy test to show a positive result for pregnancy is…
a. follicle-stimulating hormone (FSH)
b. progesterone
c. human placental lactogen (hPL)
d. luteinizing hormone (LH)
e. human chorionic gonadotropin (hCG)
e. human chorionic gonadotropin (hCG)
The transformation of a two-layered embryonic disc into a three-layered embryonic disc is called…
a. gastrulation
b. neurulation
c. fertilization
d. implantation
e. cleavage
a. gastrulation
Match the following:
chorion
……….: Becomes part of the placenta
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mesoderm
……….: becomes muscle and bone
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ectoderm
……….: develops into the epidermis and nervous system
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yolk sac
……….: is the source of blood cells from the third through the sixth week of development
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endoderm
……….: becomes the epithelial lining of the respiratory and gastrointestinal tracts
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amnion
……….: membrane that surrounds the embryo creating a fluid-filled cavity
The period of time fron conception of the zygote to delivery of the fetus is called…
a. fertilization
b. parturition
c. gestation
d. implantation
e. gastrulation
c. gestation
Which of the following is NOT a change that occurs in a female during pregnancy?
a. increased cardiac output
b. decreased pulmonary expiratory reserve volume
c. decreased gastrointestinal tract motility
d. increased frequency and urgency of urination
e. decreased production of estrogens
e. decreased production of estrogens
The afterbirth is expelled from the uterus during the ………. stage of labor.
a. parturition
b. placental
c. dilation
d. expulsion
e. puerperium
b. placental
