68 Questions in Final Exam - Animal Reproduction | ANSI 3443, Exams of Animal Biology

Download 68 Questions in Final Exam - Animal Reproduction | ANSI 3443 and more Exams Animal Biology in PDF only on Docsity! ANSI 3443 Final Exam Friday, May 5, 2006 Name __________________________________ Questions 1 thru 19 (worth 2 points each). Mark answer space (A) if the statement is true. Mark answer space (B) if the statement is false. 1. Greater nutrient intake of beef cows will increase leptin secretion. A. True B. False 2. Average age at puberty in swine and cattle is about 6 months and 11 months, respectively. A. True B. False 3. Prostaglandin F2α (PGF2α) causes vasodilation. A. True B. False 4. Norgestomet is a synthetic progestin. A. True B. False 5. A bilateral cryptorchid animal has only one testis remaining in the body cavity and is sterile. A. True B. False 6. The isthmus of an adult hen can store sperm for at least 30 days. A. True B. False 7. A pH of about 6.8 makes the vagina bacteriostatic. A. True B. False 8. Sperm stored in the ampulla of the bull age rapidly. A. True B. False 9. “CSS” stamped on some straws of bull semen stands for “Certified Semen Services”. A. True B. False 10. The percentage of cows between day 8 and 14 of the estrous cycle that would respond to PGF2α is greater than the percentage of cows that would become pregnant after timed A.I. 80 hours after a second injection of Prostaglandin F2alpha. A. True B. False 11. Bovine virus diarrhea will cause abortion anytime during gestation. A. True B. False 12. A hypertonic extender would cause a sperm head to swell and possibly burst. A. True B. False 13. Melatonin is thought to inhibit LHRH secretion in mares. A. True B. False 14. The average interval from parturition to first estrus is about 60 days in suckled beef cows. A. True B. False 15. An ultrasound equipped with a 5.0 MHz probe would be able to penetrate deeper into the abdominal cavity than an ultrasound equipped with a 7.5 MHz probe. A. True B. False 16. The length of daily photoperiod throughout the year changes more dramatically at 25° latitude than at 55° latitude. A. True B. False 17. For the farm animals discussed in class, it is the fetus that initiates the parturition process. A. True B. False 18. A cow at calving with a body condition score (BCS) of “6” on a 9-point scale will likely return to estrus sooner postpartum than cows with BCS of 3. A. True B. False 19. Reproduction in cattle is turned on or off by changing length of daylight during the year. A. True B. False 33. Stage I of parturition is characterized by: A. Dilation of the cervix. B. Strong abdominal and uterine contractions. C. Rupture of the amnion. D. Expulsion of the placenta. 34. Uterine involution is usually completed by: A. 4 days postpartum. B. 4 weeks postpartum. C. 70 days postpartum. D. 104 days postpartum. 35. An ideal 60-90 day non-return rate is: A. 20% B. 40% C. 60% D. 80% 36. The average length of gestation in the sow is: A. 114 days. B. 148 days. C. 280 days. D. 340 days. 37. Placental lactogens are: A. Present in pregnant pigs. B. Present in pregnant cows. C. Present in pregnant mares. D. Able to stimulate luteolysis. 38. The corpus luteum is the primary source of progesterone during the last month of gestation in: A. Mares. B. Cows. C. Ewes. D. Sows. 39. Which of the following would decrease the incidence of dystocia: A. Cows calving twins rather than one calf. B. 4-year old cows calving rather than 2-year old first-calf heifers calving. C. Cows giving birth to bull calves rather than heifer calves. D. Small-frame breed of cows bred to large-frame breed of sires rather than small- frame sires. 40. One management technique to induce out of season breeding in sheep is: A. Inject oxytocin. B. Inject prostaglandin F2α. C. Implant ewes with dexamethasone. D. Implant ewes with melatonin. For questions 41 thru 60 (worth 2 points each): Mark (A) if the term or statement is associated with (A) only. Mark (B) if the term or statement is associated with (B) only. Mark (C) if the term or statement is associated with (A) and (B). Mark (D) if the term or statement is associated with neither (A) nor (B). 41. The area(s) of the brain that produce or release melatonin include: A. Posterior pituitary gland. B. Preoptic area of the hypothalamus. C. Both. D. Neither. 42. Target organ(s) of progesterone include: A. Hypothalamus. B. Uterus. C. Both. D. Neither. 43. Clones can be generated by which of the following procedures: A. Bisection of embryos. B. Transplantation of a cell’s nucleus into an oocyte. C. Both D. Neither 44. The Sry Gene: A. Can be used to sex embryos. B. Is a gene found only on the X chromosome. C. Both. D. Neither. 45. Testosterone: A. Is produced by Leydig cells. B. Is vital to epididymal function. C. Both. D. Neither. 46. Seminal plasma functions to: A. Retard sperm transport in females. B. Inhibit sperm motility. C. Both. D. Neither 47. Under normal conditions, temperature of the epididymis is: A. 3-5° C cooler than body temperature in a bull. B. The same as body temperature in the rooster. C. Both. D. Neither. 48. In order for Graafian follicles in cattle to produce estrogen: A. Theca interna cells must produce androgens. B. The granulosa cells must convert androgens into estrogens. C. Both. D. Neither. 49. During embryo transfer procedures: A. Donor cows are superovulated using FSH. B. Recipient cows are synchronized using PGF2alpha. C. Both. D. Neither. 50. During diestrus, the concentration of which of the following hormones are at their highest (compared with the other stages of the cycle) in blood of cattle: A. Estradiol. B. Progesterone. C. Both. D. Neither. 51. Potential management techniques to shorten the postpartum interval in beef cows include: A. Allow calf suckling for only 2 hours per day. B. Early weaning at about 65 days post partum. C. Both. D. Neither. 52. Dystocia can be caused by: A. Uterine torsion. B. A large framed calf (Simmental) in a small framed cow (Hereford). C. Both. D. Neither. 53. Rectal palpation techniques used to monitor ovarian activity: A. Are about 20% accurate in diagnosing ovarian cysts. B. Are less than 60% accurate if a “distinct” corpus luteum is present on the ovary. C. Both. D. Neither. 54. Ultrasonography of the reproductive tract of cows: A. Can be used to monitor follicular growth. B. Can be used to sex fetuses as early as 55-60 days of pregnancy. C. Both. D. Neither.