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PSY 230 CH.3 Lecture and Textbook Questions
and Answers (100% Correct Answers)
Stages of Prenatal development
Ans: 1. Period of the Zygote: fertilization to 2 weeks
2. Period of the Embryo: 2 to 8 weeks
3. Period of the Fetus: 8 to 38 weeks(birth)
prenatal development
Ans: the many changes that turn a fertilized egg into a newborn human
-38 weeks
zygote
Ans: the fertilized egg
Period of the Zygote
Ans: -PATH TO THE UTERUS
-conception
-cell replication:fertilized egg: 4 cell zygote: 64 cell zygote
differentiation
Ans: the process by which cells specialize and begin to take on different roles.
Blastocyst
Ans: fertilized egg 4 DAYS after conception. Consist of 100 cells and resembles a
hollow ball
- zygote fertilized egg turns into a blastocyst
-trophoblast: the peripheral cells of the blastocyst, which attach the zygote
(fertilized ovum) to the uterine wall and become the placenta and the membranes
that nourish and protect the developing organism
-embryoblast: The mass of cells at the embryonic pole of the blastocyst that forms
the embryo.
next= implantation
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implantation
Ans: the process in which the zygote burrows into the uterine wall and establishes
connections with the mothers blood vessels
germ disc
Ans: A small cluster of cells near near the center of the zygote that develops into the
BABY
placenta
Ans: A mass of tissue that supplies oxygen and nutrients to the EMBRYO and carries
away waste products
-between mother and developing child
embryo
Ans: the name given to the developing baby after the zygote is COMPLETELY
embedded in the uterine wall
Period of the Embryo
Ans: starts at 2 weeks
ectoderm
Ans: the outer layer of the embryo, which becomes the hair, outer layer of skin, and
nervous system
mesoderm
Ans: the middle layer of the embryo, which will become the muscles, bones, and
circulatory system
endoderm
Ans: the INNER LAYER of the embryo, which becomes the LUNGS and the DIGESTIVE
SYSTEM
umbilical cord
Ans: a cord containing blood vessels that connects the embryo to the placenta;
structure containing veins and arteries that connects the developing child to the
placenta
amniotic sac
Ans: Inner sac in which the developing child will rest
-a fluid-filled sac which surrounds and protects the embryo
amniotic fluid
Ans: Fluid in the amnion that cushions the embryo and maintains a constant
temperature
PSY 230 CH.3 Lecture and Textbook Questions
and Answers (100% Correct Answers)
Stages of Prenatal development
Ans: 1. Period of the Zygote: fertilization to 2 weeks
2. Period of the Embryo: 2 to 8 weeks
3. Period of the Fetus: 8 to 38 weeks(birth)
prenatal development
Ans: the many changes that turn a fertilized egg into a newborn human
-38 weeks
zygote
Ans: the fertilized egg
Period of the Zygote
Ans: -PATH TO THE UTERUS
-conception
-cell replication:fertilized egg: 4 cell zygote: 64 cell zygote
differentiation
Ans: the process by which cells specialize and begin to take on different roles.
Blastocyst
Ans: fertilized egg 4 DAYS after conception. Consist of 100 cells and resembles a
hollow ball
- zygote fertilized egg turns into a blastocyst
-trophoblast: the peripheral cells of the blastocyst, which attach the zygote
(fertilized ovum) to the uterine wall and become the placenta and the membranes
that nourish and protect the developing organism
-embryoblast: The mass of cells at the embryonic pole of the blastocyst that forms
the embryo.
next= implantation
, 2 Inquire through: | Professional | Confidential Support
implantation
Ans: the process in which the zygote burrows into the uterine wall and establishes
connections with the mothers blood vessels
germ disc
Ans: A small cluster of cells near near the center of the zygote that develops into the
BABY
placenta
Ans: A mass of tissue that supplies oxygen and nutrients to the EMBRYO and carries
away waste products
-between mother and developing child
embryo
Ans: the name given to the developing baby after the zygote is COMPLETELY
embedded in the uterine wall
Period of the Embryo
Ans: starts at 2 weeks
ectoderm
Ans: the outer layer of the embryo, which becomes the hair, outer layer of skin, and
nervous system
mesoderm
Ans: the middle layer of the embryo, which will become the muscles, bones, and
circulatory system
endoderm
Ans: the INNER LAYER of the embryo, which becomes the LUNGS and the DIGESTIVE
SYSTEM
umbilical cord
Ans: a cord containing blood vessels that connects the embryo to the placenta;
structure containing veins and arteries that connects the developing child to the
placenta
amniotic sac
Ans: Inner sac in which the developing child will rest
-a fluid-filled sac which surrounds and protects the embryo
amniotic fluid
Ans: Fluid in the amnion that cushions the embryo and maintains a constant
temperature
