16 Questions for Exam 1- Animal Reproduction | ANSI 3443, Exams of Animal Biology

Download 16 Questions for Exam 1- Animal Reproduction | ANSI 3443 and more Exams Animal Biology in PDF only on Docsity! 1 ANSI 3443 Exam 1 Wednesday, February 11, 2009 Name __________________________________ INSTRUCTIONS: 1. Read all instructions carefully. 2. Use only a No. 2 lead pencil to mark the machine-scored answer sheet. 3. DO NOT fold or bend the score sheet. Print your name (exactly as it appears on the test) and ID number on the answer sheet and fill in the dots for your first and last name. 4. Make sure you have all 8 pages of the exam before starting. 5. There are a total of 41 questions for the computer scored part of the exam. Omitted answers or those marked twice are considered WRONG. Note that the answers are arranged down the column on the score sheet in groups of ten. 6. Because interpretation of exam questions is a part of the exam itself, only questions relating to misprints, typographical errors, missing pages or other similar problems will be considered during the examination period. 7. When you are finished, turn in your answer sheet and your exam. 2 Questions 1 thru 16 are worth 2 points each. For each of the following multiple choice items, choose the single most appropriate answer. 1. Which of the following is considered a steroid hormone: A. Oxytocin. B. Progesterone. C. Somatotropin. D. Protein kinase. 2. The median eminence: A. Is where Oxytocin is stored and released. B. Is comprised of blood vessels that carry uterine hormones to the ovary. C. Is located between the cerebrum and cerebellum. D. Is an area in the brain where tonic LH release is controlled. 3. Which hormone, produced by both the cow and bull, inhibits the release of prolactin: A. Growth hormone-releasing hormone. B. Dopamine. C. Corticotropic-releasing hormone. D. Inhibin. 4. The hormone that directly stimulates libido in the male is: A. Follicle stimulating hormone. B. Relaxin. C. ACTH. D. Testosterone. 5. The posterior pituitary gland is: A. Located between the optic chiasm and third ventricle. B. Located between the cerebellum and cerebrum. C. Is made of mostly non-neural tissue. D. Imbedded in the sphenoid bone. 6. The placenta of the cow secretes which of the following hormones/substances: A. Follicle stimulating hormone. B. Human chorionic gonadotropin. C. Placental lactogen. D. Gonadotropin-releasing hormone. 5 21. A synthetic hormone that is considered to have estrogen-like activity include: A. Norgestomet. B. Diethylstilbesterol. C. Both. D. Neither. 22. Target organ(s) of Inhibin include: A. Anterior pituitary gland. B. Hypothalamus. C. Both. D. Neither. 23. 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. 24. Specific of biogenic amines/ catecholamines include: A. Oxytocin. B. Epinephrine. C. Both. D. Neither. 25. Endocrine organs found in a cow AND in a bull include: A. Pineal gland. B. Testis. C. Both. D. Neither. 26. A freemartin is an example of: A. Male psuedohermaphrodite. B. Female pseudohermaphrodite. C. Both. D. Neither. 27. Sorting and sexing semen so the majority of offspring develop into females involves: A. Flow-cytometry procedures. B. Is based on the 4% difference in DNA between X and Y bearing sperm. C. Both. D. Neither. 28. Somatotropin: A. Causes vasodilation. B. Binds to nuclear receptors. C. Both. D. Neither. 6 Questions 29 thru 41 (worth 2 points each). Mark answer space (A) if the statement is true. Mark answer space (B) if the statement is false. 29. Hypothalamo-hypophyseal portal system carries hypothalamic hormones to the anterior pituitary gland without dilution in the systemic blood. A. True B. False 30. Puberty in the female is defined as the time of first ovulation and formation of first corpus luteum. A. True B. False 31. Inhibition of the LH secretion by testosterone in the male is considered an example of a negative feedback system. A. True B. False 32. Phosphodiesterase is an enzyme that converts cAMP into 5’AMP. A. True B. False 33. Synthetic steroid hormones are not degraded by the liver as quickly as the natural steroids. A. True B. False 34. PCR techniques have been developed to determine/identify sex of embryos. A. True B. False 35. A smaller medial preoptic area in females develops compared to males during sexual differentiation. A. True B. False 36. Melengesterol acetate is a synthetic progesterone/ progestin. A. True B. False 37. On average, a 2-year old bull could handle about 25 cows during a 60 to 90-day pasture mating system. A. True B. False 38. The uterus is a target organ of estradiol. A. True B. False 39. Follicle stimulating hormone stimulates estrogen production by the Leydig cells. A. True B. False 40. Mares born in fall will reach puberty sooner than mares born in Spring. A. True B. False 7 41. Masculinization of the reproductive tract in the embryo of all farm mammals occurs before implantation: A. True B. False Questions 42 thru 46 are short answers. Your answers should be written as concisely as possible with correct spelling. 42. Define or describe (2 points each; 8 total points): A. Totipotent cells: B. Radioimmunoassay: C. Cyclo-oxygenase: D. Aromatase: 43. List two hormones that act to inhibit production/secretion of other hormones in the female (2 points). 1. 2. 44. List two target organs/tissues/cells of luteinizing hormone in male or female pigs (2 points): 1. 2.