Podcast
Questions and Answers
What is the first period of prenatal development?
What is the first period of prenatal development?
- Fetal period
- Geminal period (correct)
- Infancy
- Neonatal period
- Embryonic period
During which period do organ systems begin to develop?
During which period do organ systems begin to develop?
- Embryonic period (correct)
- Fetal period
- Neonatal period
- Postovulatory age
- Geminal period
What is the clinical age of an unborn child based on?
What is the clinical age of an unborn child based on?
- Date of fertilization
- Morphological development
- Postovulatory age
- Date of implantation
- Last menstrual period (LMP) (correct)
Which term describes a baby from birth to 1 month postpartum?
Which term describes a baby from birth to 1 month postpartum?
At what age range is puberty typically reached in females?
At what age range is puberty typically reached in females?
What is the role of the acrosomal reaction during fertilization?
What is the role of the acrosomal reaction during fertilization?
What prevents polyspermy during fertilization?
What prevents polyspermy during fertilization?
What is the result of the second meiotic division in the oocyte?
What is the result of the second meiotic division in the oocyte?
What structure results from the fusion of male and female pronuclei?
What structure results from the fusion of male and female pronuclei?
What term describes a solid ball of 12 or more cells after cleavage?
What term describes a solid ball of 12 or more cells after cleavage?
At what stage does the blastocyst form?
At what stage does the blastocyst form?
What structure develops into the placenta?
What structure develops into the placenta?
What event occurs during implantation?
What event occurs during implantation?
What describes monozygotic twins?
What describes monozygotic twins?
How do dizygotic twins develop?
How do dizygotic twins develop?
What is a key difference between a morula and a blastocyst?
What is a key difference between a morula and a blastocyst?
What structure in the blastocyst becomes the embryo?
What structure in the blastocyst becomes the embryo?
What cells invade the uterine wall during implantation?
What cells invade the uterine wall during implantation?
What is the primary function of the placenta?
What is the primary function of the placenta?
How are maternal and fetal blood supplies separated in the placenta?
How are maternal and fetal blood supplies separated in the placenta?
At what stage does an embryo become a fetus?
At what stage does an embryo become a fetus?
What is the term for fine hair covering a fetus?
What is the term for fine hair covering a fetus?
What is the purpose of vernix caseosa?
What is the purpose of vernix caseosa?
When does rapid fetal growth primarily occur?
When does rapid fetal growth primarily occur?
What is the purpose of cytotrophoblast cords?
What is the purpose of cytotrophoblast cords?
What defines a zygote?
What defines a zygote?
What is the main function of the umbilical cord?
What is the main function of the umbilical cord?
What hormone is primarily produced by the trophoblast during early pregnancy?
What hormone is primarily produced by the trophoblast during early pregnancy?
When do the lacunae fill with maternal blood?
When do the lacunae fill with maternal blood?
What structure secretes proteolytic enzymes during implantation?
What structure secretes proteolytic enzymes during implantation?
How often do monozygotic twins share both a placenta and an amniotic sac?
How often do monozygotic twins share both a placenta and an amniotic sac?
What distinguishes dizygotic twins from monozygotic twins?
What distinguishes dizygotic twins from monozygotic twins?
What layer of the trophoblast invades the uterine wall during implantation?
What layer of the trophoblast invades the uterine wall during implantation?
What forms the embryonic portion of the placenta?
What forms the embryonic portion of the placenta?
When does implantation occur after fertilization?
When does implantation occur after fertilization?
Which structure of the blastocyst prepares to implant in the uterus?
Which structure of the blastocyst prepares to implant in the uterus?
What does the chorion form during pregnancy?
What does the chorion form during pregnancy?
What is the primary role of the umbilical cord?
What is the primary role of the umbilical cord?
What separates fetal blood from maternal blood in the placenta?
What separates fetal blood from maternal blood in the placenta?
What marks the beginning of the fetal period?
What marks the beginning of the fetal period?
What structure becomes the chorionic villi?
What structure becomes the chorionic villi?
What fetal structure limits the passage of harmful substances to the fetus?
What fetal structure limits the passage of harmful substances to the fetus?
What is the waxy coating that protects the fetus's skin?
What is the waxy coating that protects the fetus's skin?
What is the term for cells that can develop into a wide range of tissues?
What is the term for cells that can develop into a wide range of tissues?
What results from rapid mitotic divisions of the zygote?
What results from rapid mitotic divisions of the zygote?
What is the main function of chorionic villi during pregnancy?
What is the main function of chorionic villi during pregnancy?
What defines the morula stage?
What defines the morula stage?
What separates monozygotic twins from dizygotic twins?
What separates monozygotic twins from dizygotic twins?
What happens to the zona pellucida during implantation?
What happens to the zona pellucida during implantation?
What term refers to the hollow structure formed from the morula?
What term refers to the hollow structure formed from the morula?
Flashcards
Geminal period
Geminal period
The first period of prenatal development, from fertilization to implantation.
Embryonic period
Embryonic period
Prenatal period where organ systems begin to develop.
Fetal period
Fetal period
Prenatal period after organ development, largely growth.
Clinical age
Clinical age
Signup and view all the flashcards
Neonate
Neonate
Signup and view all the flashcards
Acrosomal reaction
Acrosomal reaction
Signup and view all the flashcards
Polyspermy
Polyspermy
Signup and view all the flashcards
Cortical reaction
Cortical reaction
Signup and view all the flashcards
Zygote
Zygote
Signup and view all the flashcards
Morula
Morula
Signup and view all the flashcards
Blastocyst
Blastocyst
Signup and view all the flashcards
Trophoblast
Trophoblast
Signup and view all the flashcards
Implantation
Implantation
Signup and view all the flashcards
Monozygotic twins
Monozygotic twins
Signup and view all the flashcards
Dizygotic twins
Dizygotic twins
Signup and view all the flashcards
Inner cell mass
Inner cell mass
Signup and view all the flashcards
Placenta
Placenta
Signup and view all the flashcards
Umbilical cord
Umbilical cord
Signup and view all the flashcards
hCG
hCG
Signup and view all the flashcards
Lanugo
Lanugo
Signup and view all the flashcards
Vernix caseosa
Vernix caseosa
Signup and view all the flashcards
Placental lacunae
Placental lacunae
Signup and view all the flashcards
Pluripotent
Pluripotent
Signup and view all the flashcards
Cleavage
Cleavage
Signup and view all the flashcards
Chorionic villi
Chorionic villi
Signup and view all the flashcards
Study Notes
Prenatal Development
- First period: The germinal period is the initial stage of prenatal development.
- Organ system development: Organ systems begin to develop during the embryonic period.
- Clinical age: The clinical age of the unborn child is based on the last menstrual period (LMP).
- Postpartum baby: A baby from birth to 1 month postpartum is called a neonate.
- Puberty in females: Puberty typically occurs between 11 and 13 years of age in females.
Fertilization
- Acrosomal reaction: The acrosomal reaction is responsible for digesting the zona pellucida.
- Polyspermy prevention: Multiple mechanisms prevent polyspermy. Cortical and fast/slow blocks prevent the entry of more than one sperm.
- Meiotic division result: A polar body and female pronucleus result from the second meiotic division in the oocyte.
- Fusion product: The fusion of male and female pronuclei results in a zygote.
- Cleavage result: A solid ball of 12+ cells in the zygote at the end of cleavage is called a morula.
Fertilization to Implantation
- Blastocyst formation: The blastocyst forms between days 3-7 after fertilization.
- Placenta structure: The trophoblast structure develops into the placenta.
- Implantation event: The blastocyst attaches to the uterine wall during implantation.
Twins
- Monozygotic twins: Monozygotic twins originate from a single zygote.
- Dizygotic twins: Dizygotic twins develop from separate zygotes.
- Dizygotic twins characteristics: Dizygotic twins have separate placentas and amniotic sacs.
Morula vs. Blastocyst
- Morula characteristics: A morula is a solid ball of cells.
- Blastocyst characteristics: A blastocyst is a hollow ball of cells.
Placenta
- Uterine wall invasion: Syncytiotrophoblast cells invade the uterine wall during implantation.
- Placental function: The placenta facilitates nutrient and gas exchange between mother and fetus.
- Blood separation: The chorion and the syncytiotrophoblast separate blood in the placenta.
Fetal Development
- Embryo to fetus: An embryo becomes a fetus at the end of the eighth week.
- Lanugo: Fine hair covering a fetus is called lanugo.
- Purpose of vernix caseosa: The vernix caseosa protects the fetus's skin.
Fetal Growth
- Fetal period growth: Rapid fetal growth occurs during the fetal period.
Genetic Factors
- Totipotent cells: Totipotent cells have the potential to develop into a wide range of tissues.
- Zygotic result: The rapid mitotic divisions of the zygote result in cleavage.
Additional Questions
- Zona pellucida during implantation: The zona pellucida hardens to prevent polyspermy, is shed by the blastocyst, and forms the chorion during implantation.
- Blastocyst structure: The blastocyst's inside cells form the embryo.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge on the stages of prenatal development and the fertilization process. Explore key concepts such as the germinal and embryonic periods, the acrosomal reaction, and mechanisms preventing polyspermy. Perfect for students studying biology or related fields.
