Q: After fertilization the blastocyst develops three germ layers. Which germ layer is the innermost…
A: In the human embryo , after about three days of fertilisation,the zygote forms a solid mass of cells…
Q: . List the major steps in oogenesis.
A: The both male and the female sexual reproductive organs are important for the reproduction process.…
Q: What causes the contraction of the uterus ?
A: The uterus is a hollow muscular organ located between the bladder and the rectum in the female…
Q: Describe the internal structure of a testis. Where are sperm cells produced? What are the functions…
A: BASIC INFORMATION MALE REPRODUCTIVE SYSTEM It includes different organs namely; Scrotum, Spermatic…
Q: Which structures develop from the neural tube and somites?
A: the structures that develop from the neural tube and somites are :
Q: What is the main stimulus for the secretory phase of the endometrium?
A: Endometrium is the inner lining of uterus made of columnar epithelial cells. Its part of female…
Q: How many days after ovulation does implantation occur, and inwhat stage is the conceptus at that…
A: Implantation is the stage when the embryo adheres to the uterine wall after fertilization. Ovulation…
Q: What uterine events are occurring when primary follicles are maturing during the follicular phase of…
A: The menstrual cycle is a progression of regular changes in chemical creation and the constructions…
Q: What happens if the fallopian tubes are partially blocked and the ovulated eggs are prevented from…
A: The fallopian tubes are two thin tubes located on each side of the uterus. It is the site of…
Q: What are some examples of genetic conditions and teratogens thatcause birth defects?
A: The term genetic refers to the genome present in the cells of an organism. Genome is the complete…
Q: How does ovulation take place?
A: In mammals, the egg is ovulated as a secondary oocyte that is at metaphase of the second meiotic…
Q: Explain the Development of a human oocyte and ovarian follicle?
A: Oogenesis it is the formation of the ovum from undifferentiated primordial cells of the ovary. it…
Q: In cryptorchidism, one or both testes of an infant have not descended into the scrotal sac by the…
A: Cryptorchidism is the absence of testes (one or both) from the scrotum. It is a common birth defect…
Q: Why does menopause occur?
A: Menopause is the natural biological decline process that defines the condition of reproductive…
Q: How are the development events, which you have observed to occur in the testis and ovary,…
A: The initial processes of gonads development are essentially similar in both sexes consisting of…
Q: What are primordial follicles?
A: The process of the formation of life or living organisms from pre-existing living organisms is…
Q: To which structures do the mesovarium, ovarian ligament, and suspensory ligament anchor the ovary?
A: The female gonad that lies in pair along either side of the uterus in the female body's pelvic…
Q: How old is an ovulated oocyte of a 35-year-old woman? What consequences does this have?
A: Fertility changes with age. For a woman, the beginning of their reproductive year starts onset of…
Q: Name the three germ layers, and identify several types of structures thatarise from each.
A: Ans: Germ layers: The layers which are formed during the early stage of embryonic development are…
Q: Describe the progression from a primordial follicle to a dominant follicle?
A: The female reproductive system consists of two ovaries, oviduct, uterus, cervix, vagina, and…
Q: What are the stages of oogenesis? Describe all the ways in which it differs from spermatogenesis ?
A: Introduction: The process of formation of the egg cells in the ovaries of the fetus is known as…
Q: What cells of the blastocyst invade the endometrium?
A: Blastocyst is a 70-100 cell structure that gets implanted in the uterus. It is composed of two types…
Q: What is the state of gonadotropin secretion during pregnancy,and what is the cause?
A: During the time of pregnancy, there are several hormones released by the placenta and ovary for the…
Q: What are the functions of somites?
A: To define functions of somites
Q: Name two types of cells in the testis other than the germ cells, and describe their locations and…
A: Ans: Testis: It is the male reproductive gonad or glands which is involved in the production of the…
Q: What are somites?
A: Somites A somite is a division of the body of an animals or embryo. Somites are bilaterally paired…
Q: What happens in the process of spermiogenesis?
A: Spermatogenesis is the formation of a haploid and functional male gametes (i.e — spermatozoa) from…
Q: Where does fertilization normally occur?
A: Reproduction ensures the continuity of species on earth. It can occur in two ways that is sexual…
Q: What type of cells surround the oocyte in a unilaminar follicle?
A: oocyte present in a unilaminar follicles. oocytes is an cell present in the ovary which form ovum…
Q: What would happen if human chorionic gonadotropin levels did not rise adequately during pregnancy?
A: Hormones are chemical messengers secreted by the glands present in the body. They are responsible…
Q: What happens during the secretory phase of the endometrium?
A: The uterine cycle represents the cyclic changes that occur inside the uterus of a female.
Q: How does the femalegamete move from the ovaryto the uterus?
A: In the sexual mode of reproduction, gametes are the male and female reproductive cells that will…
Q: What happens to the follicle immediately after ovulation?
A: Reproductive system (or genital system) is used for the sexual reproduction. The female attains…
Q: What happens to the other Graafian follicles that have matured but not ovulated during the cycle?
A: Oogenesis is defined as the process by which the female sex cells or ova or egg cells are produced.…
Q: Identify the ovarian follicles that develop before birth and those that form after puberty.
A: The spherical cellular aggregation or follicles that are found within the ovaries of a female are…
Q: Which hormones are secreated by the placenta to maintain pregnancy?
A: The placenta is an organ that develops in uterus during pregnancy. The placenta is the interface…
Q: Endometrium function?
A: UTERUS It is a major female secondary sex organ of the reproductive system in humans and most other…
Q: Is there a tube that sends ovulated oocytes from the ovary directly to the uterine tube?
A: Ovaries are attached to the outer surface of the uterus by ovarian ligaments. Uterine tube expands…
Q: At what stage is the oocyte at the time of ovulation?
A: In the female reproductive life, the menstrual or ovarian cycle occurs approximately once in every…
Q: Which hormone causes the regrowth of the endometrial lining of the uterus? a. testosterone b.…
A: The endometrium is one of the stars of the female reproductive system, playing the important roles…
Q: When does implantation of the blastocyst usually take place?
A: During fertilization, a sperm comes in contact with the zona pellucida layer of the ovum and induces…
Q: Why does puberty occur too late or too early in some individuals?
A: Puberty is a crucial stage in human development, marking the transition from childhood to adulthood.…
Q: Which germ layer of a blastocyst gives rise to muscle and connective tissues?
A: The mesoderm give rise to muscle ,connective tissue , lymphatic system bones,circulatory system,etc.
Q: What is the developmental fate of the inner cell mass of the blastocyst?
A: A diploid zygote is formed by the union of a haploid egg cell and a haploid sperm cell. The zygote…
Q: Can you explain oogenesis and the folllicular developments?
A: Oogenesis is the formation of the ovum in the female members of the mammals. It starts before birth,…
Q: What is the endocrinefunction of the placenta?
A: Placenta is the organ that develops in the uterus during pregnancy. This structure is essential for…
Which gene is responsible for the development of the gonads into testes? |
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- Which oocyte stage is ovulated? What happens to it if it encounters a sperm cell there? What happens if it does not meet up with sperm?Which hormones influence the development of sperm?What stimulates the completion of meiosis Il in a secondary oocyte? O a) A surge of Follicle-Stimulating Hormone (FSH) following the degeneration of the corpus luteum O b) A surge of Luteinising Hormone (LH) on day 13 of the menstrual cycle O) Sperm-egg binding at fertilisation d) Sperm-zona pellucida binding at fertilisation
- If fertilization occurs, the corpus luteum continues to produce hormones under the direction of Human Chorionic Gonadotrophin (HCG), which is produced by the embryo. By the third month, what begins to produce estradiol and progesterone?List two important functions of gonads.If the ovum is not fertilized, the corpus luteum regresses, and the endometrium sloughs off to result in the first day of menstrual bleeding. The latter event would be duplicated, even if fertilization occurred, if receptors for which of the following hormones were occupied by an antagonist? A) Dehydroepiandrosterone B) Estradiol C ) Estriol D) Estrone E) Progesterone
- In cryptorchidism, one or both testes of an infant have not descended into the scrotal sac by the first birthday. In these cases, the testes are surgically descended. Why must the testes be descended if the later fertility of the child is to be maintained?Describe the development of an oocyte from primordial follicle to when it is released at ovulation. How do hormones contribute to this progression? Describe the development of a spermatogonia to a spermatozoa. How do hormones contribute to this progression? What is the function of Sertoli and Leydig cells?Follicle cells left behind after ovulation A)are shed during menstruation. B)become the corpus luteum, which secretes steroid hormones. C)become the placenta, which secretes human chorionic gonadotropin. D)become the corpus luteum, which secretes luteinizing hormone.
- What is the difference in appearance between a primordial and a primary follicle?Which of the following is likely to happen when you remove the testes of an adult male rat? a) Decrease in follicle stimulating hormone. b) Decrease in the level of gonadotropin releasing hormone. c) Increase in testosterone levels. d) Increase in the level of follicle stimulating hormone.Which of the following is TRUE about the mechanism of sex determination? A) The product of the SRY gene converts the bipotential gonads into testes. B) The development of an ovary is conditioned by the presence of two X chromosomes. (C) Testosterone promotes the degeneration of the Mullerian duct. D. The ovary produces a Wolffian inhibition factor that causes the Wolffian duct to degenerate. E) The "feminization" of accessory sex orgarts is promoted by the ovary.