Placenta ... a) ... develops from trophoblast cells. b) ... develops from embryoblast cells. c) ... allows the blood of the mother and fetus to be mixed

Q: The Mullerian ducts in female mammalian embryos develop into…   a)   The vas deferens   b)   The…

A: During embryonic development, the reproductive system goes through a complex differentiation process…

Q: Select your answer from the drop-down menu. Substances from fetus and mother are exchanged across…

A: Explanation: Glucose is the major energy substrate provided to the placenta and fetus. It is…

Q: In females, meiosis is not completed (a) until birth. (b) until puberty. (c) until fertilization…

A: Gametogenesis is a process by which gametes are produced through meiotic division. Sperm and egg…

Q: At what age is it appropriate to introduce solid foods into an infant's diet? A) Immediately after…

A: It's very important to follow the recommended guidelines of the American Academy of Pediatrics and…

Q: Nutrient and waste requirements for the developing fetus are handled during the first few weeks by:…

A: Endometrium is the innermost lining of the uterus which undergoes cyclic changes during…

Q: The point mutation in the Bone Morphogenetic Protein receptor 1B (BMPR-1B) appears to have no…

A: The Bone Morphogenetic Protein receptor 1B (BMPR-1B) is a gene that encodes a transmembrane receptor…

Q: 35. The differentiation of the primitive gonads into testes or ovaries depends on the presence or…

A: The Y chromosome have SRY gene which is referred to as the sex determination region. This is present…

Q: The surface that enables active and passive exchange between the fetal and maternal bloodstreams is…

A: Answer is b.)  chorionic villi.

Q: Why is a second polar body expelled after fertilisation?   a)   To remove excess cytoplasm   b)…

A: The second polar body is a small, non-functional cell that is produced during oogenesis after the…

Q: The muscular system develops from which embryonic germ layer? a ) Ectoderm B ) Mesoderm D )…

A: The muscular system is the organ system that comprises of body's muscles. These muscles get attached…

Q: he unlabeled structure (marked by the red arrow), would in fetal life (A) transport deoxygenated…

A: The liver is defined as an organ that is present in the digestive system of the body and is present…

Q: 3. During the course of successful prenatal development, a human organism begins as a(n): A) Zygote…

A: The goal of developmental biology is to comprehend how an organism develops—how a single cell…

Q: A full-term newborn has respiratory distress. Ultrasonography shows that the abdominal organs have…

A: The objective of the question is to identify the embryonic structure whose abnormal development…

Q: In the sentence "The placenta performs an important function for the fetus," what does the word…

A: The placenta is a temporary fetal organ that begins developing from the blastocysts shortly after…

Q: The muscular system develops from which embryonic germ layer? a) Ectoderm B) Mesoderm D) Endoderm

A: The human muscular system is responsible for the movement of the human body. It is made up of over…

Q: Milk let-down is associated with (a) events occurring in the uterus. (b) placental hormonal…

A: Mammary glands have milk forming helps which helps to make milk during and after pregnancy

Q: The presence of which of the following hormones is tested for pregnancy a) Human chorionic…

A: Female body undergoes various hormonal changes during pregnancy. Hormonal fluctuations are very…

Q: The gradual modification of anatomical structures during the period from conception to maturity is,…

A: An organism refers to a living thing, which has an organized structure, can react to grow, adapt,…

Q: la)Elene worked on a construction site for part of the time that she was pregnant with her daughter,…

A: Lead in the blood of a prenatal mom can cause the baby in the womb to born too early and it also…

Q: If a woman that takes folic acid decreasing her risk of neural tube disorder does this mostly change…

A: Folic acid is the synthetic commercial form of vitamin B. it plays crucial role in the formation…

Q: The epiblast forms (a) only the ectoderm, (b) the yolk sac, (c) only the mesoderm and ectoderm, (d)…

A: In the second week of pregnancy, the inner cell mass of the blastula is split into two sheets of…

Q: which germ layer (tissue) gives rice to our nervous system and outer coverings. a) endotherm b)…

A: The mesoderm, or middle tissue, gives rise to most of the muscle and connective tissues. Finally the…

Q: Claire and Azalea were both infected with a virus known to harm prenatal development. Claire was…

A: The viruses are DNA or RNA containing organisms that behave like non-living materials outside of the…

Q: An infant is born with facial abnormalities, growth delay, cognitive disabilities and vision…

A: This group of symptoms is likely caused by maternal: d) Alcohol consumption  Due to maternal Alcohol…

Q: 6. (a) What are teratogens? (b) Thalidomide is a drug that can inhibit limb development. In what…

A: Teratology is the branch of biology that investigates the causes, mechanisms, and patterns of…

Q: Which of the following type of placenta is found in humans? a) Discoidal b) Zonary c) Diffuse d)…

A: Introduction - During the pregnancy phase, the placenta is an organ that grows inside the uterus. A…

Q: Match each date in column B (approximate time after conception) with a developmental event or stage…

A: Reproduction is one of the most important functions of an organism in order to further its own kind…

Q: The opening between the two atria is found in a placental mammal fetus is called the:

A: The heart is the most vital organ of the body in biological organisms that works continuously from…

Q: S 138. A male newborn has albinism. The most likely cause of the lack of pigmentation in this…

A: The objective of the question is to identify the origin of the cells that are most likely…

Q: During this procedure, a sample of the fluid that surrounds the fetus is obtained by inserting a…

A: The ultrasound imaging technology creates images of the body tissue by using high-frequency sound…

Q: It is currently possible to save some premature babies born as early as week (a) 8, (b) 16, (c) 22,…

A: The development of the embryo and of the fetus during the gestation period is known as prenatal…

Q: The muscular system develops from which embryonic germ layer? a ) Ectoderm B ) Mesoderm D )…

A: An embryo forms from the zygote and a zygote develops from the fusion of male and female gametes.…

Q: 31. What following health practice should one do to maintain a healthy endocrine system? * a. eat…

A: The endocrine system is made up of glands, which are organs that produce hormones. Glands produce…

Q: The muscular system develops from which embryonic germ layer? a ) Ectoderm B ) Mesoderm D )…

A: The three germ layers are the endoderm, the ectoderm, and the mesoderm. Cells in each germ layer…

Q: The primary germ layer that forms the trunk muscles, heart, and skeleton is (a) ectoderm, (b)…

A: Organogenesis is the process of formation of different organs from the three germ layers, the…

Q: What is the recommended sleeping position for infants to reduce the risk of Sudden Infant Death…

A: A seemingly healthy baby under a year old dies unexpectedly, generally during sleep, from Sudden…

Q: In the cnidaria the ectoderm cells are important because they can react to a stimulus (light) from…

A: Cnidaria possess two layers, endoderm and ectoderm. The gastrodermis, or inner lining, is formed by…

Q: Which two extraembryonic structures form the placenta in humans? a) chorion and amnion b) amnion and…

A: Placenta is the structure formed between the fetus and the uterine lining of the maternal tissue.…

Q: 299. A 3 month infant is brought to the physician because of an upper respiratory tract infection.…

A: Case summary patient is a 3 month infant with upper respiratory tract infection. Complaint of…

Q: the milk-letdown reflex, which cells are categorized as neuroendocrine cells? a) Sensory neurons in…

A: Neuroendocrine cells are specialized cells that receive neuronal input in the form of…