UNIT 1 CHAPTER III HUMAN REPRODUCTION Q 17. Explain the role of pituitary and ovarian hormones in menstrual cycle in human females. 3M Ans : Pituitary hormones follicle maturation –FSH-stimulates LH -rapid secretion --- LH surge ---- induces rupture of graffian follicle ---- ovum released. Ovarian hormones ---- estrogen --- stimulates follicular development Progesterone ----- corpus leutium ---- maintains endometrium. Q 18. Explain the following- Trophoblast, Spermiation, Birth canal, Spermiogenesis. (Any Three) 3M Ans: Trophoblast Outer layer of blastocyst which send finger like projections called chorionic villi into uterine – tissue which together form the placenta. Spermiation After spermiogenesis, sperm head get embedded into the sertoli cells and is finally released – from seminiferous tubule by the process called Spermiation. Birth canal The vaginal canal along with the cervix is called birth canal. It helps in parturition. – Spermiogenesis The process involving transformation of spermatids in to spermatozoa is called – spermiogenesis. Q 19 the schematic events of spermatogenesis and oogenesis. 5M –describe Ans : Spermatogenesis Oogenesis UNIT 1 CHAPTER IV REPRODUCTION HEALTH Q 20. Describe any 5 methods of birth control/contraceptive methods. 5M Ans 1. Natural / traditional methods a) periodic abstinence b) coitus interruptus c) Lactational – amenorrhea. 2. Barrier methods a) Condoms b) Diaphragms, Cervical caps and Vaults c) Spermicidal cream, gellies & – foams. 3. LUDS - a) Non medicated IUD ex. Lippes loop b) Copper releasing IUD ex. Cu T c) Hormone releasing IUD ex. Progestasert.
UNIT 1 CHAPTER III HUMAN REPRODUCTION Q 17. Explain the role of pituitary and ovarian hormones in menstrual cycle in human females. 3M Ans : Pituitary hormones –FSH-stimulates follicle maturation LH -rapid secretion --- LH surge ---- induces rupture of graffian follicle ---- ovum released. Ovarian hormones ---- estrogen --- stimulates follicular development Progesterone ----- corpus leutium ---- maintains endometrium. Q 18. Explain the following- Trophoblast, Spermiation, Birth canal, Spermiogenesis. (Any Three) 3M Ans: Trophoblast – Outer layer of blastocyst which send finger like projections called chorionic villi into uterine tissue which together form the placenta. Spermiation – After spermiogenesis, sperm head get embedded into the sertoli cells and is finally released from seminiferous tubule by the process called Spermiation. Birth canal – The vaginal canal along with the cervix is called birth canal. It helps in parturition. Spermiogenesis – The process involving transformation of spermatids in to spermatozoa is called spermiogenesis. Q 19 –describe the schematic events of spermatogenesis and oogenesis. 5M Ans : Spermatogenesis Oogenesis UNIT 1 CHAPTER IV REPRODUCTION HEALTH Q 20. Describe any 5 methods of birth control/contraceptive methods. 5M Ans 1. Natural / traditional methods – a) periodic abstinence b) coitus interruptus c) Lactational amenorrhea. 2. Barrier methods – a) Condoms b) Diaphragms, Cervical caps and Vaults c) Spermicidal cream, gellies & foams. 3. LUDS - a) Non medicated IUD ex. Lippes loop b) Copper releasing IUD ex. Cu T c) Hormone releasing IUD ex. Progestasert.
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