Human Embryonic Development

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What is the primary function of the amnion?

To transport nutrients and oxygen between the embryo and trophoblast

To form the urinary bladder

To produce and contain the yolk sac

To produce and contain the amniotic fluid (correct)

Which membrane is the first to appear during embryonic development?

Allantois

Yolk sac (correct)

Amnion

Chorion

What is the main function of the chorion?

To produce blood cells

To transport nutrients and oxygen between the embryo and trophoblast (correct)

To produce and contain the amniotic fluid

To form the urinary bladder

Which membrane is responsible for forming the urinary bladder?

Allantois Signup and view all the answers

What is the relationship between the chorion and the placenta?

The placenta is formed from the chorion Signup and view all the answers

When does the placenta take over the production of progesterone from the corpus luteum?

Between the 1st and 2nd trimester Signup and view all the answers

What is the role of the liver in blood cell formation?

It develops blood cells and then migrates to the bone marrow Signup and view all the answers

What is the part of the endometrium that remains attached to the placenta?

Decidua basalis Signup and view all the answers

What is the condition where the placenta is implanted very low, which means the placenta has to come out first during delivery?

Placenta previa Signup and view all the answers

What is the function of the umbilical artery?

To carry deoxygenated blood from the baby to the placenta Signup and view all the answers

What is the hormone produced by the placenta that helps maintain the corpus luteum during the first three months of pregnancy?

Human Chorionic Gonadotropin (HCG) Signup and view all the answers

What is the part of the endometrium that surrounds the free-floating chorion membrane?

Decidua capsularis Signup and view all the answers

What is the consequence of placenta previa?

Requires a C-section Signup and view all the answers

What is the function of hyaluronic acid produced by the syncytial trophoblast?

Breaks down the endometrial membrane, allowing the embryo to burrow in Signup and view all the answers

What is the function of the placenta?

To supply the fetus with oxygen and nutrients Signup and view all the answers

What is the term for the process of the embryo burrowing into the endometrium?

Implantation Signup and view all the answers

What is the outermost layer of the blastodisc called?

Trophoblast Signup and view all the answers

What is the purpose of the syncytial trophoblast?

To produce hyaluronic acid and facilitate implantation Signup and view all the answers

What is the term for the formation of the 3 layers of the blastodisc?

Gastrulation Signup and view all the answers

What is the role of the epiblast in gastrulation?

It migrates to the primitive streak to form the 3 germ layers Signup and view all the answers

What is the term for the layer that develops into the nervous system?

Ectoderm Signup and view all the answers

What is the term for the process of cell division that produces sibling cells with half the haploid number of chromosomes?

Meiosis Signup and view all the answers

What is the term for the joining of two gametes to form a zygote?

Fertilization Signup and view all the answers

How many chromosomes are present in a zygote?

46 Signup and view all the answers

What is the term for the adhesion of the blastocyst to the uterine cell wall?

Implantation Signup and view all the answers

What is the term for the sequence of divisions that ends with contact with the uterine wall?

Cleavage Signup and view all the answers

What is the term for the type of twin that forms when a single fertilized egg breaks apart and develops into two separate zygotes?

Monozygotic Signup and view all the answers

Where does fertilization typically occur?

Fallopian tube Signup and view all the answers

What is the consequence if no implantation occurs?

No HCG is produced and pregnancy is not confirmed Signup and view all the answers

What is the purpose of detecting HCG?

To confirm pregnancy Signup and view all the answers

What is the significance of the cervical canal during labor?

It allows for fetal passage during delivery Signup and view all the answers

What is the function of effacement during labor?

It thins the uterine lining Signup and view all the answers

What is the primary function of prostaglandins in labor?

They stimulate smooth muscle contraction Signup and view all the answers

What is the role of oxytocin in labor?

It stimulates uterine contractions Signup and view all the answers

What is the function of relaxin in fetal development?

It softens the pelvic ligaments Signup and view all the answers

What is the typical duration of the placental stage of labor?

20-40 minutes Signup and view all the answers

What is the term for the expulsion of the fetus?

Parturition Signup and view all the answers

What is the consequence of pushing too early during labor?

The opening swells with rebound closure Signup and view all the answers

Human Embryonic Development

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Questions and Answers

What is the primary function of the amnion?

Which membrane is the first to appear during embryonic development?

What is the main function of the chorion?

Which membrane is responsible for forming the urinary bladder?

What is the relationship between the chorion and the placenta?

When does the placenta take over the production of progesterone from the corpus luteum?

What is the role of the liver in blood cell formation?

What is the part of the endometrium that remains attached to the placenta?

What is the condition where the placenta is implanted very low, which means the placenta has to come out first during delivery?

What is the function of the umbilical artery?

What is the hormone produced by the placenta that helps maintain the corpus luteum during the first three months of pregnancy?

What is the part of the endometrium that surrounds the free-floating chorion membrane?

What is the consequence of placenta previa?

What is the function of hyaluronic acid produced by the syncytial trophoblast?

What is the function of the placenta?

What is the term for the process of the embryo burrowing into the endometrium?

What is the outermost layer of the blastodisc called?

What is the purpose of the syncytial trophoblast?

What is the term for the formation of the 3 layers of the blastodisc?

What is the role of the epiblast in gastrulation?

What is the term for the layer that develops into the nervous system?

What is the term for the process of cell division that produces sibling cells with half the haploid number of chromosomes?

What is the term for the joining of two gametes to form a zygote?

How many chromosomes are present in a zygote?

What is the term for the adhesion of the blastocyst to the uterine cell wall?

What is the term for the sequence of divisions that ends with contact with the uterine wall?

What is the term for the type of twin that forms when a single fertilized egg breaks apart and develops into two separate zygotes?

Where does fertilization typically occur?

What is the consequence if no implantation occurs?

What is the purpose of detecting HCG?

What is the significance of the cervical canal during labor?

What is the function of effacement during labor?

What is the primary function of prostaglandins in labor?

What is the role of oxytocin in labor?

What is the function of relaxin in fetal development?

What is the typical duration of the placental stage of labor?

What is the term for the expulsion of the fetus?

What is the consequence of pushing too early during labor?

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