Free NEET Biology multiple-choice questions on Human Reproduction. Attempt each question and reveal the answer with a full explanation.
Leydig cells, found in the interstitial spaces of the testes, secrete which of the following? Androgens Progesterone Estrogens Corticosteroids Seminal plasma in humans is rich in : Fructose and certain enzymes but poor calcium Fructose and calcium but has no enzyme Fructose, calcium and certain enzymes Glucose and certain enzymes but has no calcium The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is : Spermatogonia-spermatid-spermatocyte-sperms Spermatocyte-spermatogonia-spermatid-sperms Spermatogonia-spermatocyte-spermatid-sperms Spermatid-spermatocyte-spermatogonia-sperms What is the correct sequence of sperm formation? (1) Spermatid, Spermatocyte, Spermatogonia, Spermatozoa (2) Spermatogonia, Spermatocyte, Spermatozoa, Spermatid (3) Spermatogonia, Spermatozoa, Spermatocyte, Spermatid (4) Spermatogonia, Spermatocyte, Spermatid, Spermatozoa Menstrual flow occurs due to lack of (1) Progesterone (2) FSH (3) Oxytocin (4) Vasopressin The shared terminal duct of the reproductive and urinary system in the human male is : Urethra Ureter Vas deferens Vasa efferentia The main function of mammalian corpus luteum is to produce : estrogen only progesterone human chorionic gonadotropin relaxin only Trace the correct path of sperm from seminiferous tubules : (1) Rete testis → vasa efferentia → epididymis → vas deferens (2) Rete testis → epididymis → vasa efferentia → vas deferens (3) Vasa efferentia → rete testis → vas deferens → epididymis (4) Epididymis → vasa efferentia → rete testis → vas deferens Select the correct sequence for transport of sperm cells in male reproductive system. Testis → Epididymis → Vasa efferentia → Vas deferens → Ejaculatory duct → Inguinal canal → Urethra → Urethral meatus Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus Seminiferous tubules → Vasa efferentia → Epididymis → Inguinal canal → Urethra Meiotic division of the secondary oocyte is completed (1) At the time of copulation (2) After zygote formation (3) At the time of fusion of a sperm with an ovum (4) Prior to ovulation Which of these is not an important component of initiation of parturition in humans ? Synthesis of prostaglandins Release of Oxytocin Release of Prolactin Increase in estrogen and progesterone ratio In human females, the Bartholin's glands are situated: On either side of the vaginal opening On either side of the vas deferens In the wall of the uterus Between the bladder and the rectum Which of the following secretes the hormone, relaxin, during the later phase of pregnancy? (1) Corpus luteum (2) Foetus (3) Uterus (4) Graafian follicle At which stage of life the oogenesis process is initiated? Embryonic development stage Birth Adult Puberty Given below are two statements: Statement I: Vas deferens receives a duct from seminal vesicle and opens into urethra as the ejaculatory duct. Statement II: The cavity of the cervix is called cervical canal which along with vagina forms birth canal. In the light of the above statements, choose the correct answer from the options given below: Both Statement I and Statement II are true. Both Statement I and Statement II are false. Statement I is correct but Statement II is false. Statement I is incorrect but Statement II is true. Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A : Breast-feeding during initial period of infant growth is recommended by doctors for bringing a healthy baby. Reason R : Colostrum contains several antibodies absolutely essential to develop resistance for the new born baby. In the light of the above statements, choose the most appropriate answer from the options given below: Both A and R are correct and R is the correct explanation of A Both A and R are correct but R is NOT the correct explanation of A A is correct but R is not correct A is not correct but R is correct Which of the following is not a component of Fallopian tube? Uterine fundus Isthmus Infundibulum Ampulla The first menstruation is called : Ovulation Menopause Menarche Diapause Match List - I with List - II. array llll ; & List - I & ; & List - II A. & Head & (I) & Enzymes B. & Middle piece & (II) & Sperm motility C. & Acrosome & (III) & Energy D. & Tail & (IV) & Genetic material array Choose the correct answer from the options given below : A-III, B-II, C-I, D-IV A-IV, B-III, C-I, D-II A-IV, B-III, C-II, D-I A-III, B-IV, C-II, D-I Arrange the following cell layers/structures around the female gamete, from outer to inner side : A. Zona pellucida B. Perivitelline space C. Corona radiata D. Plasma membrane of ovum Choose the correct answer from the options given below : D, B, A, C A, C, B, D C, A, D, B C, A, B, D During the follicular phase of the menstrual cycle, the secretion of which hormone(s) increases gradually? Estrogen and FSH Progesterone and LH Only Progesterone Only FSH During menopause, the significant increase in the blood levels of which hormones is used as a clinical diagnostic marker? FSH and LH Estrogen and Progesterone Inhibin and Relaxin hCG and hPL In a human male, the condition where the testes fail to descend into the scrotum is called: Cryptorchidism Impotency Castration Azoospermia Which hormone is primarily responsible for the 'LH surge' by exerting a positive feedback on the pituitary during the late follicular phase? Estrogen Progesterone Inhibin FSH The fluid-filled cavity found in a tertiary follicle is called the: Antrum Zona pellucida Corona radiata Atrium The hormone 'Inhibin' is produced by Sertoli cells in males and Granulosa cells in females. Its primary function is to: Inhibit the secretion of FSH Inhibit the secretion of LH Stimulate the production of Testosterone Stimulate the growth of the endometrium The part of the fallopian tube that is funnel-shaped and possesses finger-like projections is the: Infundibulum Ampulla Isthmus Uterine fundus The proliferation phase of the human menstrual cycle is primarily under the influence of: Estrogen Progesterone LH Relaxin During the 'Lactational Amenorrhea' period, why is the chance of conception almost nil? High levels of prolactin inhibit the secretion of gonadotropins (GnRH, LH, FSH) The uterine endometrium is too thin for implantation The cervical mucus is too thick for sperm penetration The acidity of the vagina kills all entering sperm Which of the following hormones are produced in women only during pregnancy? hCG, hPL, and Relaxin Estrogen, Progesterone, and hCG hPL, Oxytocin, and LH Relaxin, FSH, and hCG Which of the following is a hormone secreted by Sertoli cells that inhibits the secretion of FSH? Inhibin LH GnRH Testosterone The mammary ampulla in the human female breast is connected directly to which structure? Lactiferous duct Mammary duct Mammary tubule Alveoli In human females, the primary oocyte completes its first meiotic division within the: Tertiary follicle Primary follicle Secondary follicle Graafian follicle The term 'Mittelschmerz' refers to: Abdominal pain associated with ovulation The cessation of the menstrual cycle Pain during parturition A condition of irregular menstruation The correct pathway of milk through the mammary glands is: Alveoli Mammary Tubules Mammary Duct Mammary Ampulla Lactiferous Duct Alveoli Mammary Duct Mammary Tubules Lactiferous Duct Mammary Ampulla Mammary Tubules Alveoli Mammary Duct Lactiferous Duct Alveoli Mammary Ampulla Mammary Duct Lactiferous Duct During the follicular phase of the menstrual cycle, the 'LH surge' is triggered by a sudden rise and positive feedback from which hormone? Estrogen Progesterone FSH GnRH In which of the following plants is the fruit a 'false fruit' because the thalamus contributes to fruit formation? Strawberry Mango Banana Grape Which of the following layers of the blastocyst is responsible for the formation of the embryo proper? Inner cell mass Trophoblast Zona pellucida Corona radiata The tallest flower 'Amorphophallus' provides which of the following as a 'floral reward' to its pollinators? A safe place to lay eggs Abundant nectar and fragrance Edible pollen grains Protection from predators The 'milk ejection reflex' is triggered by the release of which hormone from the posterior pituitary? Oxytocin Prolactin Estrogen Progesterone What is the function of the 'Interstitial cells' or 'Leydig cells' found in the human male reproductive system? Synthesis and secretion of testicular hormones called androgens Provide nutrition to the germ cells Secretion of mucus for lubrication of the penis Formation of the blood-testis barrier During the process of double fertilization, the pollen tube enters the embryo sac through which structure? Micropyle Chalaza Integuments Funicle Which hormone is primarily responsible for the maintenance of the endometrium during pregnancy? Progesterone Estrogen FSH LH The 'Statutory ban' on amniocentesis in India is mainly to prevent: Female foeticide Genetic disorders Metabolic disorders Miscarriage Which of the following is NOT a part of the external genitalia in human females? Cervix Mons pubis Labia majora Clitoris Amniocentesis is a process used to: Determine genetic abnormalities in the fetus Determine the health of the mother Check the heart rate of the fetus Induce abortion Which of the following represents the 'Placentation' type in which the ovules are borne on the central axis and septa are absent? Free central Axile Parietal Basal The rapid screening for pregnancy using a 'Gravindex' or similar home kit relies on the detection of which hormone in the urine? Human Chorionic Gonadotropin (hCG) Progesterone Estrogen Luteinizing Hormone (LH) If mammalian ovum fails to get fertilized, which one of the following is unlikely - Estrogen secretion further decreases Progesterone secretion rapidly declines Corpus luteum will disintegrate Primary follicle starts developing Which part of ovary in mammals acts as an endocrine gland after ovulation ? stroma germinal epithelium vetelline membrane Graafian follicle. Given below is a diagrammatic sketch for a portion of human male reproductive system. Select the correct set of the names of the parts labelled A, B, C, D. Ureter ; Seminal vesicle ; Prostate ; Bulbourethral gland Ureter ; Prostate ; Seminal vesicle ; Bulbouretharal gland Vas deferens ; Seminal vesicle ; Prostate ; Bulbourethral gland Vas deferens ; Seminal vesicle ; Bulbourethral gland ; Prostate Which of the following is the correct matching of the events occurring during menstrual cycle ? Menstruation — Breakdown of myometrium and ovum not fertilized Ovulation — LH and FSH attain peak level and sharp fall in the secretion of progesterone Proliferative phase — Rapid regeneration of myometrium and maturation of Grafian follicle Development of corpus luteum — Secretory phase and increased secretion of progesterone. Select the incorrect statement : FSH stimulates the sertoli cells which help in spermiogenesis LH triggers ovulation in ovary LH and FSH decrease gradually during the follicular phase LH triggers secretion of androgens from the Leydig cells Changes in GnRH pulse frequency in females is controlled by circulating levels of :- estrogen and progesterone estrogen and inhibin progesterone only progesterone and inhibin Identify the correct statement on 'inhibin' :- Inhibits the secretion of LH, FSH and Prolactin. Is produced by granulose cells in ovary and inhibits the secretion of FSH. Is produced by granulose cells in ovary and inhibits the secretion of LH. Is produced by nurse cells in testes and inhibits the secretion of LH. Which part of the flower is modified into the 'Juicy hair' or 'Juicy vesicles' in a citrus fruit like orange? Endocarp Mesocarp Epicarp Thalamus The difference between spermiogenesis and spermiation is In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed. In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed. In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed. In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules. Match the items given in Column I with those in Column II and select the correct option given below : ii iii i i iii ii iii ii i iii i ii Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle? High concentration of Progesterone Low concentration of LH Low concentration of FSH High concentration of Estrogen Match the following columns and array ll 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) Lubrication of the Penis array select the correct option. a-i, b-iv, c-ii, d-iii a-iii, b-ii, c-iv, d-i a-ii, b-iii, c-iv, d-i a-iv, b-iii, c-i, d-ii Given below are two statements: Statement I : The release of sperms into the seminiferous tubules is called spermiation. Statement II : Spermiogenesis is the process of formation of sperms from spermatogonia. In the light of the above statements, choose the most appropriate answer from the options given below : Both Statement I and Statement II are incorrect Statement I is correct but Statement II is incorrect Statement I is incorrect but Statement II is correct Both Statement I and Statement II are correct Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis? (a) It results in the formation of haploid gametes (b) Differentiation of gamete occurs after the completion of meiosis (c) Meiosis occurs continuously in a mitotically dividing stem cell population (d) It is controlled by the Luteinising hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary (e) It is initiated at puberty Choose the most appropriate answer from the options given below: (b) and (c) only (b), (d) and (e) only (b), (c) and (e) only (c) and (e) only Which of the following statements are correct regarding female reproductive cycle? A. In non-primate mammals cyclical changes during reproduction are called oestrus cycle. B. First menstrual cycle begins at puberty and is called menopause. C. Lack of menstruation may be indicative of pregnancy. D. Cyclic menstruation extends between menarche and menopause. Choose the most appropriate answer from the options given below. (1) A and D only (2) A and B only (3) A, B and C only (4) A, C and D only Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : FSH acts upon ovarian follicles in female and Leydig cells in male. Reason R : Growing ovarian follicles secrete estrogen in female while interstitial cells secrete androgen in male human being. In the light of the above statements, choose the correct answer from the options given below : Both A and R are true and R is the correct explanation of A Both A and R are true but R is NOT the correct explanation of A A is true but R is false A is false but R is true Identify the correct option (A), (B), (C), (D) with respect to spermatogenesis. FSH, Leydig cells, Sertoli cells, spermiogenesis. ICSH, Interstitial cells, Leydig cells, spermiogenesis. FSH, Sertoli cells, Leydig cells, spermatogenesis. ICSH, Leydig cells, Sertoli cells, spermatogenesis. Consider the following : A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis. B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females. C. The first polar body is associated with the formation of the primary oocyte. D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding. Choose the correct answer from the options given below: B and C are true A and B are true A and C are true B and D are true The first sign of growing fetus can be noticed by listening to the heart sound carefully through the stethoscope. This occurs after of pregnancy. One month Two months Three months Four months Spermatogonia undergo a series of cell divisions statements to produce sperms. Select the correct from the following : A. Spermatogonia always undergo meiotic cell division. B. Primary spermatocytes divide mitotically to produce secondary spermatocytes. C. Secondary spermatocytes, through their second meiotic division, produce haploid spermatids. D. Spermatids produce spermatozoa through mitosis. E. Spermatids transform into spermatozoa by spermiogenesis. Choose the correct answer from the options given below: A, C and E only C and E only A and E only B, C and D only Which of the following struture is not a part of the male reproductive system? Rete testis Epididymis Vasa efferentia Infundibulum Given below are two statements: Statement I : Ovulation is caused by LH surge leading to rupture of Graafian follicles. Statement II : Graafian follicle remaining after ovulation transform into corpus luteum and secretes large amount of estrogen. In the light of the above statements, choose the most appropriate answer from the options given below: Both Statement I and Statement II are correct Both Statement I and Statement II are incorrect Statement I is correct but Statement II is incorrect Statement I is incorrect but Statement II is correct The covering of ovum at ovulation is . endometrium zona radiata zona pellucida chorion Sertoli cells are regulated by the pituitary hormone known as- FSH GH Prolactin LH Withdrawal of which of the following hormones is the immediate cause of menstruation ? (1) Estrogen (2) FSH (3) FSH-RH (4) Progesterone