Reproduction
- Match List - I with List - II.List - I / List - II(a) Vaults (i) Entry of sperm through Cervix is blocked(b) IUDs (ii) Removal of Vas deferens(c) Vasectomy (iii) Phagocytosis of sperms within the Uterus(d) Tubectomy (iv) Removal of fallopian tubeChoo… Answer: 2. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv) Vaults (barrier method) block entry of sperm through the cervix - (i) IUDs cause phagocyto... 1
- Receptors for sperm binding in mammals are present on : Answer: 4. Zona pellucida In mammals, sperm-binding receptors are present on the zona pellucida, the glycoprotein layer around the ovum. Bin... 1
- Which of the following secretes the hormone, relaxin, during the later phase of pregnancy ? Answer: 2. Corpus luteum Relaxin, which relaxes pelvic ligaments in late pregnancy, is secreted by the corpus luteum (and placenta). Graafia... 1
- Which of these is not an important component of initiation of parturition in humans ? Answer: 4. Release of Prolactin Parturition is initiated by foetal signals, rise in oestrogen to progesterone ratio, prostaglandin synthesis... 1
- Veneral diseases can spread through :(a) Using sterile needles(b) Transfusion of blood from infected person(c) Infected mother to foetus(d) Kissing(e) InheritanceChoose the correct answer from the options given below. Answer: 3. (b) and (c) only Sexually transmitted diseases spread by sexual contact, sharing of infected needles, blood transfusion from an i... 1
- Which one of the following is an example of Hormone releasing IUD ? Answer: 2. LNG 20 Hormone releasing IUDs release progestogen or hormone slowly into the uterus. LNG-20 releases levonorgestrel. CuT, Cu7 and... 1
- Match the following columns and select the correct option.Column - I | Column - II(a) Placenta | (i) Androgens(b) Zona pellucida | (ii) Human Chorionic Gonadotropin (hCG)(c) Bulbo-urethral glands | (iii) Layer of the ovum(d) Leydig cells | (iv) Lubri… Answer: 4. (a) (ii), (b) (iii), (c) (iv), (d) (i) Placenta secretes hCG: (a) - (ii). Zona pellucida is a layer of the ovum: (b) - (iii). Bul... 1
- Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle ? Answer: 1. High concentration of Estrogen Ovulation is triggered by the LH surge in mid-cycle, and that surge is itself caused by a high lev... 1
- Select the option including all sexually transmitted diseases. Answer: 1. Gonorrhoea, Syphilis, Genital herpes Sexually transmitted diseases include gonorrhoea, syphilis and genital herpes, so option 1 i... 1
- Meiotic division of the secondary oocyte is completed : Answer: 4. At the time of fusion of a sperm with an ovum Key idea: The secondary oocyte is arrested in metaphase II and completes meiosis II... 1
- In which of the following techniques, the embryos are transferred to assist those females who cannot conceive ? Answer: 1. ZIFT and IUT Key idea: Techniques that transfer an embryo, not gametes, are ZIFT and IUT. In ZIFT, a zygote or early embryo (up t... 1
- Select the hormone-releasing Intra-Uterine Devices. Answer: 3. Progestasert, LNG-20 Key idea: Hormone-releasing IUDs are progestogen releasing. Progestasert and LNG-20 release progestogen (lev... 1
- Extrusion of second polar body from egg nucleus occurs : Answer: 1. after entry of sperm but before fertilization Key idea: Sperm entry stimulates completion of meiosis II. The secondary oocyte is... 1
- Which of the following sexually transmitted diseases is not completely curable ? Answer: 3. Genital herpes Key idea: Bacterial STDs are curable with antibiotics; viral ones are not completely curable. Gonorrhoea and chlam... 1
- Which of the following contraceptive methods do involve a role of hormone ? Answer: 1. Lactational amenorrhea, Pills, Emergency contraceptives Key idea: Only methods that change hormone levels involve a hormone. Oral... 1
- Select the correct sequence for transport of sperm cells in male reproductive system. Answer: 2. Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus S... 1
- The contraceptive 'SAHELI' Answer: 1. blocks estrogen receptors in the uterus, preventing eggs from getting implanted. Key idea: Saheli is a non-steroidal oral contrac... 1
- The amnion of mammalian embryo is derived from Answer: 1. ectoderm and mesoderm Key idea: The extra-embryonic membranes are formed from the germ layers. The amnion is made of extra-embryo... 1
- The difference between spermiogenesis and spermiation is Answer: 4. In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of sem... 1
- Match the items given in Column I with those in Column II and select the correct option given below :Column I | Column IIa. Proliferative Phase | i. Breakdown of endometrial liningb. Secretory Phase | ii. Follicular Phasec. Menstruation | iii. Luteal… Answer: 2. a-ii b-iii c-i Key idea: Match the phases of the menstrual cycle in the uterus and the ovary. Proliferative phase (endometrium gr... 1
- Hormones secreted by the placenta to maintain pregnancy are Answer: 2. hCG, hPL, progestogens, estrogens Key idea: The placenta works as a temporary endocrine gland. It secretes hCG, hPL (human placen... 1
- Match the following sexually transmitted diseases (Column - I) with their causative agent (Column - II) and select the correct option.Column - I: (a) Gonorrhea (b) Syphilis (c) Genital Warts (d) AIDSColumn - II: (i) HIV (ii) Neisseria (iii) Treponema… Answer: 4. (ii) (iii) (iv) (i) Match each disease with its pathogen. (a) Gonorrhea: Neisseria gonorrhoeae = (ii) (b) Syphilis: Treponema pal... 1
- In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation ? Answer: 2. Artificial Insemination Key idea: When the male has a very low sperm count, semen is collected, concentrated and placed in the fe... 1
- The function of copper ions in copper releasing IUD's is : Answer: 4. They suppress sperm motility and fertilising capacity of sperms. Key idea: Cu ions released by the IUD act mainly on sperm. Coppe... 1