30 Questions
What is the primary function of the structure described in the first sentence?
Providing nutrition
When does the structure become the site of primitive hematopoiesis and first blood production?
In the 3rd week
What is the role of the primordial germ cells that appear in the endodermal epithelium of the sac in the 3rd week?
They migrate towards the gonads in weeks 5-6
What is the purpose of the amniotic fluid swallowed by the fetus?
It passes into the respiratory and digestive systems and fetal bloodstream
What is the typical amount of amniotic fluid at full term (40 weeks)?
800 to 1000 ml
How often does the water content of the amniotic fluid change?
Every 3 hours
What is the role of the umbilical vein?
Carrying oxygenated blood with nutrients to the fetus
What is the function of the umbilical arteries?
Carrying waste products from the fetus to the placenta
What is the consequence of umbilical cord entanglement and knotting?
Hypoxia and brain damage in the fetus
Which statement about the placenta is true?
It facilitates gas and nutrient exchange between maternal and fetal circulations
What is the function of Wharton's jelly in the umbilical cord?
Supporting and protecting blood vessels in the cord
What can happen due to prolonged oxygen deficiency in a fetus?
Brain damage and mental retardation
What is the main function of the trophoblast cells in a blastocyst?
Provide nutrients to the embryo
Which layer of trophoblast cells is involved in the formation of the Chorion (fetal placenta)?
Syncytiotrophoblast
During implantation, which part of the chorion lacks villi and is not a component of the placenta?
Chorion laeve
What role do chorionic villi play in fetal-maternal exchange?
Exchange of nutrients and gases between mother and fetus
Which event marks the beginning of nutrition and gas exchange between the embryo and mother?
Vascularization on week 4
What is the key function of the syncytiotrophoblast layer during pregnancy?
Invasion into surrounding stroma
What is a potential mode of transmission for the parasite mentioned in the text?
Consuming undercooked meat
Which symptom is associated with the presence of too much fluid in or around the brain according to the text?
Severe eye infection
What is a common risk factor that can lead to placenta complications as described in the text?
History of tobacco and cocaine abuse
Which symptom is NOT associated with severe disease caused by the parasite described in the text?
Placenta previa
What does placenta accreta refer to as per the text?
Placenta adhered to the uterine wall
What can lead to infection by the parasite during pregnancy according to the text?
Multiple pregnancies
What is the primary function of progesterone and estrogen produced by the placenta?
Maintaining pregnancy
At what point during pregnancy does the level of human chorionic gonadotropin (hCG) reach its highest level in the mother's blood and urine?
Eighth week
Which of the following is NOT a potential effect of rubella infection during pregnancy?
Peripheral pulmonary stenosis
What is the primary mode of transmission for toxoplasmosis?
Ingestion of contaminated food or water
Which hormone is synthesized by the syncytiotrophoblasts in the fetal placenta?
Both progesterone and estrogen
What is the primary function of human chorionic gonadotropin (hCG) during early pregnancy?
Suppressing the menstrual cycle and maintaining the corpus luteum
Test your knowledge on the development of the embryo during the second to fourth week. Questions cover topics such as nutrition, hematopoiesis, germ cell production, and the differentiation of various organ systems like the digestive tract and respiratory system.
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