Nokea
What is the content of the acrosome?
- A. Lipids
- B. Hormones
- C. Digestive enzymes
- D. None of the above
Correct Answer: C
Rationale: The correct answer is C: Digestive enzymes. The acrosome is a structure found in sperm cells that contains enzymes used to penetrate the egg during fertilization. Choice A (Lipids) and Choice B (Hormones) are incorrect as the primary content of the acrosome is digestive enzymes, not lipids or hormones. Choice D (None of the above) is incorrect as the acrosome does contain a specific substance, which are digestive enzymes.
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What is the role of the corpus luteum during the menstrual cycle?
- A. The corpus luteum produces estrogen to maintain the endometrium.
- B. The corpus luteum produces progesterone to maintain the endometrium.
- C. The corpus luteum produces testosterone to inhibit ovulation.
- D. The corpus luteum has no significant role during the menstrual cycle.
Correct Answer: B
Rationale: The correct answer is B: The corpus luteum produces progesterone to maintain the endometrium during the menstrual cycle. This hormone helps prepare the uterine lining for implantation in case fertilization occurs. Choice A is incorrect because estrogen is mainly produced by the developing follicles in the ovaries. Choice C is incorrect as testosterone is produced in smaller amounts by the ovaries and adrenal glands but does not play a significant role in maintaining the endometrium. Choice D is incorrect as the corpus luteum plays a crucial role in producing progesterone to support the endometrium.
What is the most common cause of abortion in Zambia?
- A. Malaria.
- B. Tuberculosis.
- C. HIV.
- D. Ascariasis.
Correct Answer: A
Rationale: The correct answer is A: Malaria. Malaria is a prevalent cause of abortion in Zambia due to its impact on maternal health. Malaria infection during pregnancy can lead to severe complications, including miscarriage. Choices B, C, and D are incorrect because while Tuberculosis, HIV, and Ascariasis are significant health issues, they are not the commonest cause of abortion in Zambia as Malaria.
During which phase of the menstrual cycle does the Graafian follicle rupture?
- A. Regenerative
- B. Menstruation
- C. Ovulation
- D. Proliferative
Correct Answer: C
Rationale: The correct answer is C: Ovulation. The Graafian follicle ruptures during the ovulation phase, releasing the mature egg from the ovary. This process marks the midpoint of the menstrual cycle. Choice A, Regenerative, is incorrect as it does not correspond to a specific phase of the menstrual cycle. Choice B, Menstruation, is incorrect because menstruation is the shedding of the uterine lining and occurs after ovulation if fertilization does not occur. Choice D, Proliferative, is incorrect as it refers to the phase in which the uterine lining thickens in preparation for a potential embryo implantation, which happens after ovulation.
Amniocentesis deals with patterns of ______ in the amniotic fluid.
- A. Fingers
- B. DNA
- C. Chromosomes
- D. Proteins
Correct Answer: C
Rationale: Amniocentesis is a prenatal test that involves examining chromosomes in the amniotic fluid to detect genetic abnormalities. Therefore, the correct answer is 'Chromosomes.' The other choices, such as 'Fingers,' 'DNA,' and 'Proteins,' do not accurately represent what is analyzed during an amniocentesis procedure and are unrelated to the genetic information obtained through this test.
What action does the copper used in Copper T have?
- A. Blastocidal
- B. Bacteriostatic
- C. Bacteriocidal
- D. Spermicidal
Correct Answer: D
Rationale: The correct answer is D, Spermicidal. The copper in Copper T exerts its action by affecting sperm viability and motility, thus preventing fertilization. Choices A, B, and C are incorrect because Copper T primarily works by preventing sperm from reaching and fertilizing the egg, rather than acting on blastocysts, bacteria, or bacteriocins.