43. You are trying to determine whether or not a woman is pregnant based on her

Question

43. You are trying to determine whether or not a woman is pregnant based on her body. Based on what you know about hormone which of the following hormones would be the best indicator of a) luteinizing hormone (LH) b) human chorionic gonadotropin (hCG) c) progesterone d) estrogen e) follicle-stimulating hormone (FSH) hormone levels in activity in the female reproductive system, 44. The acrosome of the sperm: a) provides energy for movement. b) carries the genetic "payload" of the sperm. c) carries the enzymes that help digest the exterior coats of the egg d) helps to trigger the completion of meiosis by the sperm cell. e) prevents more than one sperm from fertilizing the same egg 45. Contraception usually involves one of three methods. What are these three? a) preventing implantation, preventing spermatogenesis, preventing fertilization b) preventing ovulation, preventing oogenesis, preventing copulation c) preventing implantation, preventing sexual excitation, inhibiting lubrication d) preventing fertilization, preventing implantation, preventing ovulation 46. How does the "morning-after" pill prevent pregnancy? a) It contains estrogen and progesterone that together block FSH production. uterus. c) It contains chemicals that directly kill sperm. d) It contains an overwhelming amount of estrogen that, in turn, prevents implantation of the b) It causes temporary plugs to form in the Fallopian tubes, blocking the embryo entering the em e) It contains antibodies that bind to sperm, rendering them inactive. 47. Why are STDs nearly impossible to eradicate from the population? a) Most STDs are incurable. b) Infected people are often asymptomatic, and all partners have to be treated simultaneously to prevent re-infection. c) Many STDs get much worse before they get better during the course of medical treatment; therefore, people stop taking their medications. d) Most STDs are completely resistant to the only drugs known to kill them. e) Using contraceptives increases the transmission of STDs 48. Your lungs are derived from which of the following embryonic germ layers? a) the ectoderm b) the endoderm c) the mesoglea d) the mesoderm e) None of the above embryonic germ layers give rise to the lungs.

Explanation / Answer

43) Human chorionic gonadotropin is the first hormone to appear in urine during pregnancy. SO the correct answer here is (b).

44)The acrosome of the sperm carries enzyme like hyaluronidase and acrosin which digest the outer memnbrane of ovum, zona pellucida. So the correct answer here is (c).

45)Contraception usually involves one of three methods. Preventing fertilization, preventing implantation, and preventing ovulation. So the correct option here is (d).

46)

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