Anatomy Test 5 Question Set 1
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Questions and Answers

What is the primary function of gametes in the reproductive system?

  • Provide nutrients for the zygote
  • Regulate body temperature
  • Transmit genetic information to offspring (correct)
  • Facilitate implantation in the uterus
  • Stimulate hormone production
  • During fertilization, where does the fusion of sperm and oocyte typically occur?

  • Ampulla of the uterine tube (correct)
  • Endometrium
  • Cervix
  • Isthmus of the uterine tube
  • Vaginal canal
  • Which structure in the male reproductive system produces testosterone?

  • Prostate gland
  • Leydig cells (correct)
  • Seminiferous tubules
  • Sertoli cells
  • Epididymis
  • What is the role of the Sertoli cells?

    <p>Nourish and protect developing sperm (D)</p> Signup and view all the answers

    What distinguishes meiosis I from meiosis II?

    <p>Homologous chromosomes separate in meiosis I (A)</p> Signup and view all the answers

    Where does fertilization usually occur in the female reproductive tract?

    <p>Ampulla of the uterine tube (D)</p> Signup and view all the answers

    What is the primary function of the corpus luteum?

    <p>Produce estrogen and progesterone after ovulation (A)</p> Signup and view all the answers

    Which hormone is primarily responsible for triggering ovulation?

    <p>Luteinizing hormone (LH) (C)</p> Signup and view all the answers

    What is the functional significance of the fimbriae?

    <p>To sweep the oocyte into the uterine tube (B)</p> Signup and view all the answers

    What type of tissue composes the endometrium?

    <p>Simple columnar epithelium with tubular glands (B)</p> Signup and view all the answers

    What is the ploidy of a primary spermatocyte?

    <p>Diploid (D)</p> Signup and view all the answers

    Which process involves the differentiation of spermatids into mature sperm?

    <p>Spermiogenesis (E)</p> Signup and view all the answers

    At what stage does oogenesis arrest until puberty?

    <p>Prophase I (D)</p> Signup and view all the answers

    What structure forms after the Graafian follicle releases its oocyte?

    <p>Corpus luteum (B)</p> Signup and view all the answers

    Which hormone maintains the corpus luteum during early pregnancy?

    <p>hCG (C)</p> Signup and view all the answers

    During which stage of prenatal development do organ systems begin to develop?

    <p>Embryonic period (C)</p> Signup and view all the answers

    Which layer of the embryo develops into the nervous system?

    <p>Ectoderm (B)</p> Signup and view all the answers

    What is the primary function of the placenta?

    <p>Provide oxygen and nutrients to the fetus (B)</p> Signup and view all the answers

    Which event occurs first during fertilization?

    <p>Penetration of the corona radiata (B)</p> Signup and view all the answers

    How many chromosomes are present in a zygote?

    <p>46 (E)</p> Signup and view all the answers

    Which hormone stimulates the anterior pituitary to release FSH and LH?

    <p>GnRH (D)</p> Signup and view all the answers

    What is the primary role of FSH in the female reproductive system?

    <p>Stimulate follicular development (E)</p> Signup and view all the answers

    Which hormone inhibits FSH secretion during the luteal phase?

    <p>Inhibin (D)</p> Signup and view all the answers

    What happens during the luteal phase of the ovarian cycle?

    <p>Corpus luteum forms and secretes hormones (E)</p> Signup and view all the answers

    Which hormone is critical for milk ejection during lactation?

    <p>Oxytocin (A)</p> Signup and view all the answers

    Which muscle helps regulate the temperature of the testes?

    <p>Dartos muscle (E)</p> Signup and view all the answers

    What is the role of the epididymis?

    <p>Store and mature sperm (E)</p> Signup and view all the answers

    Which structure connects the testes to the abdominal cavity?

    <p>Vas deferens (B)</p> Signup and view all the answers

    What fluid does the prostate gland contribute to semen?

    <p>Slightly acidic fluid with enzymes like PSA (C)</p> Signup and view all the answers

    Which part of the urethra runs through the penis?

    <p>Spongy (penile) urethra (E)</p> Signup and view all the answers

    Where does implantation typically occur?

    <p>Endometrium of the uterus (D)</p> Signup and view all the answers

    Which uterine layer sheds during menstruation?

    <p>Endometrial functional layer (D)</p> Signup and view all the answers

    What is the primary function of the uterine tubes?

    <p>Transport oocytes to the uterus (C)</p> Signup and view all the answers

    What are the primary components of the mammary glands?

    <p>Lobules with alveoli and lactiferous ducts (C)</p> Signup and view all the answers

    What ligament supports the uterus in place?

    <p>Round ligament (E)</p> Signup and view all the answers

    What prevents polyspermy during fertilization?

    <p>Cortical reaction and zona pellucida changes (D)</p> Signup and view all the answers

    At which stage does the zygote become a blastocyst?

    <p>Day 5 (D)</p> Signup and view all the answers

    What structure in the blastocyst becomes the embryo?

    <p>Inner cell mass (B)</p> Signup and view all the answers

    Which term describes the hollow ball of cells formed after the morula?

    <p>Blastocyst (C)</p> Signup and view all the answers

    What happens during gastrulation?

    <p>Formation of the primitive streak and three germ layers (C)</p> Signup and view all the answers

    What is the probability of two heterozygous parents producing a homozygous dominant offspring?

    <p>25% (B)</p> Signup and view all the answers

    Which type of inheritance involves a single trait determined by multiple genes?

    <p>Polygenic (B)</p> Signup and view all the answers

    Which genetic condition is associated with X-linked inheritance?

    <p>Hemophilia A (A)</p> Signup and view all the answers

    What does a karyotype show?

    <p>Chromosomal abnormalities and structure (A)</p> Signup and view all the answers

    Which type of allele requires two copies for its expression?

    <p>Recessive (C)</p> Signup and view all the answers

    What triggers the release of oxytocin during labor?

    <p>Stretching of the uterus (D)</p> Signup and view all the answers

    What is the role of prolactin during lactation?

    <p>Stimulates milk production (B)</p> Signup and view all the answers

    What is the significance of the Apgar score?

    <p>Measures the newborn's health after birth (A)</p> Signup and view all the answers

    Which hormone is highest during the first trimester of pregnancy?

    <p>hCG (D)</p> Signup and view all the answers

    What is the function of the umbilical cord?

    <p>Provide oxygen and nutrients to the fetus (B)</p> Signup and view all the answers

    What structure forms from the trophoblast and aids in implantation?

    <p>Syncytiotrophoblast (D)</p> Signup and view all the answers

    What hormone is secreted by the placenta to maintain the endometrial lining?

    <p>Progesterone (E)</p> Signup and view all the answers

    What occurs during the fetal period of development?

    <p>Growth and functional maturation of organ systems (E)</p> Signup and view all the answers

    What is the function of the amniotic fluid?

    <p>Protect the fetus from mechanical injury (C)</p> Signup and view all the answers

    Which hormone increases uterine excitability at the onset of labor?

    <p>Estrogen (D)</p> Signup and view all the answers

    What is the first stage of labor?

    <p>Cervical dilation (C)</p> Signup and view all the answers

    What is assessed by the "Grimace" component of the Apgar score?

    <p>Reflex irritability (E)</p> Signup and view all the answers

    Which fetal structure closes to separate the pulmonary and systemic circulation after birth?

    <p>Foramen ovale (B)</p> Signup and view all the answers

    What is the primary role of lanugo on a developing fetus?

    <p>Protect the skin in utero (B)</p> Signup and view all the answers

    What initiates the production of meconium in a newborn?

    <p>Digestion of amniotic fluid and cells (E)</p> Signup and view all the answers

    Which type of inheritance results in a blended phenotype?

    <p>Incomplete dominance (D)</p> Signup and view all the answers

    What is the genotype for a heterozygous individual with a dominant and recessive allele?

    <p>Aa (D)</p> Signup and view all the answers

    What is the probability of a male inheriting an X-linked trait from a carrier mother?

    <p>50% (B)</p> Signup and view all the answers

    What determines the sex of a human embryo?

    <p>Y chromosome contributed by the father (D)</p> Signup and view all the answers

    What does codominance mean in genetics?

    <p>Both alleles are equally and fully expressed (E)</p> Signup and view all the answers

    What is a common physical change in males due to aging?

    <p>Decrease in sperm production (A)</p> Signup and view all the answers

    What happens to the uterine size after menopause?

    <p>Decreases by 50% within 15 years (E)</p> Signup and view all the answers

    What causes hot flashes during menopause?

    <p>Fluctuation in LH and FSH secretion (E)</p> Signup and view all the answers

    Which tissue is affected most by reduced elasticity in aging?

    <p>Connective tissue (A)</p> Signup and view all the answers

    What is a significant risk factor for developing osteoporosis in aging women?

    <p>Decreased levels of estrogen (C)</p> Signup and view all the answers

    Flashcards

    Gamete function

    Transmit genetic information to offspring.

    Fertilization site

    Typically occurs in the ampulla of the uterine tube.

    Testosterone producer

    Leydig cells produce testosterone in males.

    Sertoli cells' role

    Nourish and protect developing sperm.

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    Meiosis I vs. Meiosis II

    Meiosis I separates homologous chromosomes; Meiosis II separates sister chromatids.

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    Female fertilization site

    Typically occurs in the ampulla of the uterine tube.

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    Corpus luteum function

    Produces estrogen and progesterone after ovulation.

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    Ovulation trigger

    Luteinizing hormone (LH) triggers ovulation.

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    Fimbriae function

    Sweep the oocyte into the uterine tube.

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    Endometrium tissue

    Simple columnar epithelium with tubular glands.

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    Primary spermatocyte ploidy

    Diploid.

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    Spermatid differentiation

    Spermiogenesis.

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    Oogenesis arrest stage

    Prophase I.

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    Post-ovulation follicle structure

    Corpus luteum.

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    hCG function during pregnancy

    Maintains the corpus luteum.

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    Prenatal organ development stage

    Embryonic period.

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    Nervous system precursor layer

    Ectoderm.

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    Placenta function

    Provides oxygen and nutrients to the fetus.

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    First fertilization event

    Penetration of the corona radiata.

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    Zygote chromosome count

    46 chromosomes.

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    GnRH function

    Stimulates anterior pituitary LH and FSH release.

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    FSH's primary female role

    Stimulate follicular development

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    Luteal phase inhibitor

    Inhibin.

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    Luteal phase event

    Corpus luteum forms and secretes hormones.

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    Milk ejection hormone

    Oxytocin.

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    Testes temperature regulator

    Dartos muscle.

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    Epididymis role

    Store and mature sperm.

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    Testes to abdomen connection

    Vas deferens.

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    Prostate fluid

    Slightly acidic fluid with enzymes like PSA.

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    Penile urethra part

    Spongy (penile) urethra.

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    Implantation site

    Endometrium.

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    Menstrual layer

    Endometrial functional layer.

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    Uterine tube function

    Transport oocytes to the uterus.

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    Mammary gland components

    Lobules with alveoli and lactiferous ducts.

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    Uterus support ligament

    Round ligament.

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    Polyspermy prevention

    Cortical reaction and zona pellucida changes.

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    Zygote to blastocyst stage

    Day 5.

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    Embryo formation from blastocyst

    Inner cell mass.

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    Blastocyst description

    Hollow ball of cells.

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    Gastrulation outcome

    Formation of primitive streak and three germ layers.

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    Homozygous dominant offspring probability

    25%.

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    Multiple-gene inheritance type

    Polygenic.

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    X-linked inheritance example

    Hemophilia A.

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    Karyotype shows

    Chromosomal abnormalities and structure.

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    Recessive allele expression

    Requires two copies.

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    Labor oxytocin trigger

    Uterine stretching.

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    Lactation hormone for milk production

    Prolactin.

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    Apgar score use

    Assesses newborn health.

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    Highest pregnancy hormone (first trimester)

    hCG.

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    Umbilical cord function

    Nutrient and oxygen transport to fetus.

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    Endometrium-sustaining hormone

    Progesterone, secreted by the placenta, helps maintain the lining of the uterus during pregnancy.

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    Fetal period

    The stage of development where organs grow and mature functionally, beginning around week 9 of gestation.

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    Amniotic fluid role

    Amniotic fluid acts as a cushion, protecting the fetus from physical shocks and impacts.

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    Labor initiation hormone

    Estrogen increases uterine excitability, contributing to the onset of labor.

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    First labor stage

    The cervical dilation stage of labor, where the cervix opens to allow the baby to pass through.

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    Apgar 'Grimace'

    The 'Grimace' component of the Apgar score evaluates the newborn's reflex irritability, a measure of their responsiveness to stimuli.

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    Post-birth circulatory change

    The foramen ovale, a hole in the fetal heart, closes after birth, separating the pulmonary and systemic circulation.

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    Lanugo function

    Lanugo, a fine hair covering the fetus, protects the skin during development.

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    Meconium production

    Meconium, the first stool of a newborn, is formed from amniotic fluid and shed cells.

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    Blended phenotype inheritance

    Incomplete dominance results in a phenotype that is a blend of the two parental alleles.

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    Heterozygous genotype

    A heterozygous individual has one dominant and one recessive allele, represented by 'Aa'.

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    X-linked trait inheritance probability

    A male has a 50% chance of inheriting an X-linked trait from his carrier mother.

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    Sex determination

    The Y chromosome, contributed by the father, determines the sex of a human embryo.

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    Codominance in genetics

    In codominance, both alleles are expressed equally and fully.

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    Male aging change

    A decrease in sperm production is a common physical change in aging males.

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    Menopause and uterus size

    The uterus shrinks significantly after menopause, decreasing by 50% within 15 years.

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    Menopausal hot flashes

    Fluctuations in LH and FSH secretion during menopause cause hot flashes due to reduced estrogen.

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    Elasticity loss in aging

    Connective tissue, responsible for elasticity, is most affected by reduced elasticity in aging.

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    Osteoporosis risk factor

    Decreased estrogen levels in aging women increase the risk of developing osteoporosis.

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    Inner cell mass function

    The inner cell mass, a group of cells within the blastocyst, develops into the embryo.

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    Trophoblast function

    The trophoblast, an outer layer of cells surrounding the blastocyst, forms the placenta.

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    Germ layer formation

    Gastrulation forms three primary germ layers: ectoderm, mesoderm, and endoderm.

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    Amnion function

    The amnion surrounds the embryo, forming a fluid-filled sac that protects and cushions it.

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    Chorion function

    The chorion, an outer membrane surrounding the amnion, contributes to the formation of the placenta.

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    Placental hormone function

    Human Chorionic Gonadotropin (hCG) is produced by the placenta and maintains the corpus luteum during early pregnancy.

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    Fetal circulation change

    The ductus arteriosus, a blood vessel connecting the pulmonary artery to the aorta, closes after birth.

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    Uterine involution

    After childbirth, the uterus shrinks back to its normal size through a process called uterine involution.

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    Oxytocin function

    Oxytocin stimulates uterine contractions during labor and milk ejection during breastfeeding.

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    Apgar score components

    The Apgar score evaluates five key parameters: heart rate, respiratory effort, muscle tone, reflex irritability, and color.

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    Study Notes

    Reproductive System

    • Gamete function: Transmit genetic information to offspring.
    • Fertilization site: Typically occurs in the ampulla of the uterine tube.
    • Testosterone production: Leydig cells in the male reproductive system produce testosterone.
    • Sertoli cell role: Nourish and protect developing sperm.
    • Meiosis I vs. Meiosis II: Meiosis I separates homologous chromosomes; Meiosis II separates sister chromatids.

    Female Reproductive System

    • Fertilization location: Ampulla of the uterine tube.
    • Corpus luteum function: Produces estrogen and progesterone after ovulation.
    • Ovulation trigger: Luteinizing hormone (LH).
    • Fimbriae function: Sweep the oocyte into the uterine tube.
    • Endometrium composition: Simple columnar epithelium with tubular glands.

    Spermatogenesis and Oogenesis

    • Primary spermatocyte ploidy: Diploid.
    • Spermatid maturation: Spermiogenesis differentiates spermatids into mature sperm.
    • Oogenesis arrest: Arrests in prophase I until puberty.
    • Post-ovulation structure: Corpus luteum forms after the Graafian follicle releases its oocyte.
    • Corpus luteum maintenance: Human chorionic gonadotropin (hCG) maintains the corpus luteum during early pregnancy.

    Development and Genetics

    • Organ system development: Embryonic period.
    • Nervous system development source: Ectoderm.
    • Placenta function: Provides oxygen and nutrients to the fetus.
    • Fertilization initiation: Penetration of the corona radiata by the sperm.
    • Zygote chromosome count: 46 chromosomes.

    Hormonal Control of Reproduction

    • FSH and LH release trigger: Gonadotropin-releasing hormone (GnRH).
    • FSH's female role: Stimulates follicular development.
    • Luteal phase inhibitor: Inhibin.
    • Luteal phase event: Corpus luteum forms and secretes hormones.
    • Milk ejection hormone: Oxytocin.

    Male Reproductive Anatomy

    • Testis temperature regulation: Dartos muscle.
    • Epididymis role: Stores and matures sperm.
    • Testes to abdomen connection: Vas deferens.
    • Prostate gland secretion: Slightly acidic fluid with enzymes like PSA.
    • Penile urethra: Spongy (penile) urethra.

    Female Reproductive Anatomy

    • Implantation location: Endometrium of the uterus.
    • Menstruation shedding layer: Endometrial functional layer.
    • Uterine tube function: Transport oocytes to the uterus.
    • Mammary gland components: Lobules, alveoli, and lactiferous ducts.
    • Uterine support: Round ligament.

    Fertilization and Early Development

    • Polyspermy prevention: Cortical reaction and zona pellucida changes.
    • Blastocyst formation: Day 5.
    • Embryo origin in blastocyst: Inner cell mass.
    • Blastocyst structure: Hollow ball of cells.
    • Gastrulation process: Formation of the primitive streak and three germ layers.

    Genetics

    • Heterozygous parent probability: 25% chance of producing a homozygous dominant offspring.
    • Multiple gene trait: Polygenic inheritance.
    • X-linked condition example: Hemophilia A.
    • Karyotype reveals: Chromosomal abnormalities and structure.
    • Recessive allele expression: Requires two copies.

    Pregnancy and Lactation

    • Labor oxytocin trigger: Stretching of the uterus.
    • Milk production hormone: Prolactin.
    • Newborn health assessment: Apgar score.
    • First trimester hormone: hCG.
    • Umbilical cord function: Provide oxygen and nutrients to the fetus.

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    Description

    Test your knowledge on the reproductive system, covering key concepts such as gamete function, fertilization, and hormonal regulation. Explore spermatogenesis and oogenesis processes, along with the roles of different cells involved. This quiz will challenge your understanding of both male and female reproductive anatomy and physiology.

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