Q: Placenta ... a) ... develops from trophoblast cells. b) ... develops from embryoblast cells. c)…
A: Pregnancy occurs when the male gamete sperm fuses and fertilizes with the female egg that is…
Q: Conduct online research on teratogens and acquired birth defects. Resulting birth defects.
A: Any substance that exposes a foetus to an abnormality while the mother is pregnant is considered a…
Q: Explain how the structure of the placenta prevents mixing of fetal and maternal blood while allowing…
A: -First to understand placenta . Placenta -- It is composed of fetal part which includes the…
Q: Define a teratogen and provide several examples of teratogens.
A: BASIC INFORMATION ENZYMES They are the catalyst. They help in accelerating the chemical reaction.…
Q: Describe the stages of birth, and also explain the role of midwives and doulas in the birth process
A: Labour is a process of giving birth the product of conception in completed gestational age. labor…
Q: Name the process of shedding of placenta from the uterus of mother after the birth of a baby.
A: When a sperm fuses with the egg a zygote is formed. This zygote further divides to form an embryo.…
Q: describe implantation including the process of placentation, embryonic development, and membrane…
A: The processes of implantation, placentation, embryonic development and membrane formation occurs…
Q: State the roles of progesterone and estrogen in fetal development.
A: BASIC INFORMATION FERTILIZATION It is the process of the fusion of the male as well as the female…
Q: Unlike some other types of birth defects, neural tube defects are largely preventable. Explain
A: Birth defects refer to the defects that occur in a person while he/she is still a fetus growing in…
Q: Define amniocentesis
A: During pregnancy, several procedures and tests are done by medical practitioners. These tests help…
Q: Describe the formation and implantation of a human blastocyst
A: Developmental biology is the branch of science that includes the studies of a diversity of…
Q: Name and describe each of the three stages of prenatal development. Then go on to explain the…
A: Fertilization is the mechanism through which the haploid gametes fuse to form a diploid cell. The…
Q: Explain the function of the placenta.
A: The placenta is referred to as the organ that develops in the body within the mother's uterus at the…
Q: Describe two ways that an oocyte avoids polyspermy.
A: The fertilization of the egg takes place by the fusion of the sperm and the ovum. Sperm is produced…
Q: Explain the organization of the mammary gland with the help of a diagram.
A: Female reproductive system consists of a pair of ovaries, glands, a duct system and many supporting…
Q: List and describe the phases of embryonic development; from a zygote through gastrulation. What…
A: Reproduction is the process of the formation of offspring from their parents. There are two modes of…
Q: Distinguish between modes of mesoderm formation
A:
Q: Compare the number of gametes produced during oogenesisand spermatogenesis in humans.
A: Sexual organs or the gonads, that is the cells of the ovary and the testes are the only cells that…
Q: Explain the process of fertilisation and implantation.
A: Fertilization is the process of the union of mobile sperm cell and immobile egg, generally taking…
Q: Describe what happens during the first days of embryonic development from the first cell division…
A: Human embryo development occurs through cell division and the differentiation of cells. Human embryo…
Q: Indicate and provide reasons for what is likely happen to pregnancy if a luteolytic dose of…
A: Prostaglandins induced falls in progestogen concentration and rises in ICSH concentration; neither…
Q: Explain the way in which the egg gets prepared for fertilization during oogenesis.
A: The process through which the male and female gametes combine to create the zygote is known as…
Q: Describe the features and process of a fetus embryo at 10 weeks of pregnancy
A: Within twenty-four hours once fertilization, the egg that may become your baby quickly divides into…
Q: ________________________is the period of development from fertilization to birth, whereas is the…
A: Gestation is considered as the period between conception ( or certification) and birth when the baby…
Q: If the egg is not fertilized in mammals, the endometrium is shed as
A: Introduction: The inner layer is the endometrium. During a woman's menstrual cycle, hormones cause…
Q: . The structure labeled C, within which development occurs, is known as the a. placenta. b. oviduct…
A: The picture is showing the foetus in the womb of mother.
Q: Describe the spermatogenesis and oogenesis in human
A:
Q: Explain the location of the testes in the fetal pig.
A: Anatomy can be defined as a branch of biology that is associated with the study of the organism’s…
Q: Describe the processes of fertilization and implantation
A: Fertilization: The process of fertilization involves the fusion of the nuclei of the male sperm with…
Q: Poor embryonic development occurs because ____________________________.
A: After fertilization, a single celled diploid zygote is formed, which later develops into…
Q: Explain why pregnant women often suffer from back strain late in their pregnancy.
A: Pregnancy, also known as gestation is the time during which one or more offspring develops inside…
Q: Which of the following statements is not true about the placenta? A. It provides exchange of wastes…
A: During pregnancy, inside the uterus, the organ placenta develops. It is found attached to the wall…
Q: The embryonic stage is completed by the end of the ___________________ week of development.
A: Embryonic development or embryogenesis is the mechanism or process by which an embryo. forms and…
Q: Chemicals that pass through the placenta’s screen and mayharm an embryo or fetus are called…
A: The common chromosomal abnormality that occurs due to a missing or extra chromosome number is called…
Q: Explain why the adolescent gravida is at greaterrisk of complications of pregnancy.
A: Adolescent gravida Gravida describes the term of number of pregnancies. Pregnacy during adolescence…
Q: Describe the process of neuralation. b) Identify the germ layer from which the nervous system…
A: The time amid conception and birth is known as gestation. The baby develops and grows within the…
Q: explain the developmental processes that will happen to the fertilized ovum of a dog or any animal
A: The individual entity that embodies the attributes of life is known as an organism. There are two…
Q: The order in which the physiological stages occur during embryonic development is and
A: The fusion of haploid male gamete(sperm) and female gamete(egg/ovum) to form diploid zygotes is…
Q: The ectodermal layer in the fetus will develop into:
A: Correct answer: Nerve and Skin (first option)
Q: ain The process of releasing of an egg from the ovary is called .
A: Ova (singular egg cell, from the Latin term egg cell, which means 'egg') is another name for egg…
Q: Explain why teratogens are difficult to identify.
A: Introduction:- Teratogens are substances that may produce physical or functional defects in the…
List a number of teratogens and how they impact prenatal development.
Provide examples such as research experiments done on this.
Step by step
Solved in 3 steps
- Name and describe each of the three stages of prenatal development. Then go on to explain the possible impact of teratogens at each stage. Specifically, look at what structures are most likely to be impacted at each stage.In general, the greatest vulnerability to teratogens occurs during: Group of answer choices the last part of the fetal period of prenatal development. A the embryonic period of prenatal development. B the zygotic period of prenatal development. C the germinal period of prenatal development. DFactors that can cause congenital malformations by affecting an embryo during its periods of rapid growth and development are called teratogens. TRUE or FALSE
- describe implantation of a blastocyte using simple label diagrams.Describe two additional teratogens that are not frequently occurring. Try to find ones that are rare and/or unusual. One you have identified two, then be sure to discuss what are the potential side effects and risks to the developing fetus.Identify one disease, one drug, and an environmental hazard that is known to negatively impact prenatal development. Be sure to describe the specific impact of each teratogen.
- What happens if an oocyte combines with sperm? Describe the processes involved in implantation. Mention what is occurring, where it is occurring, and any significant hormones involved. How does the zygote make its way through the uterine tube? Women who smoke cigarettes have an increased risk of ectopic pregnancy because the chemicals they absorb paralyze cilia all through the body. Explain.Teratology is the study of exogenous chemical compounds (teratogens) that have the capacity to cause drastic damage to developing embryos. Teratogens include certain chemicals, medications, social drugs, alcohol, smoking, and infections, which a woman should avoid during pregnancy. Complete the information required in the tables below: Table 2: Alcohol, smoking and psychoactive drugs Teratogen Effect Images Alcohol Tobacco smoke Marijuana Amphetamines Heroin or methadone CocaineDescribe the processes of fertilization and implantation
- Which of the following rows correctly identifies the stage in development and the embryonic age most sensitive to teratogens, respectively? Select one: a. Stage Embryonic Age Fetus 6 to 40 weeks b. Stage Embryonic Age Embryo 6 to 12 weeks c. Stage Embryonic Age Embryo 0 to 9 weeks d. Stage Embryonic Age Fetus 9 to 16 weeksList three ways in which oogenesis differs from spermatogenesis. Be specific!Briefly describe the function of the following: - spermatogenic cell