The chromosomal disorder CORRECTLY matched with its karyotype is:
- A. Turner’s syndrome – 45X0
- B. Klinefelter’s syndrome – XYY
- C. Patau’s syndrome – Trisomy 21
- D. Edward’s syndrome – Trisomy 13
Correct Answer: A
Rationale: Step-by-step rationale:
1. Turner's syndrome is characterized by a missing X chromosome, resulting in a karyotype of 45X0.
2. Klinefelter's syndrome involves an extra X chromosome, leading to a karyotype of 47XXY.
3. Patau's syndrome is Trisomy 13, not Trisomy 21.
4. Edward's syndrome is Trisomy 18, not Trisomy 13.
Therefore, the correct answer is A because Turner's syndrome is correctly matched with a karyotype of 45X0.
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Human milk can be kept frozen in the freezer section of a side-by-side refrigerator-freezer for
- A. 2 weeks
- B. 3 to 4 months
- C. 6 months
Correct Answer: B
Rationale: Properly stored frozen human milk remains safe and nutritious for several months.
Labor and delivery is defined as precipitate if labor lasts less than
- A. one hour
- B. three hours
- C. five hours
Correct Answer: B
Rationale: Precipitous labor is unusually rapid, completing within three hours.
What does FSH primarily act to stimulate?
- A. Development of the uterine endometrium
- B. Release of the mature ovum
- C. Maturation of the ovarian follicle
- D. Development of the ovary
Correct Answer: C
Rationale: FSH primarily acts to stimulate the maturation of the ovarian follicle. FSH facilitates the growth and development of the follicle in the ovary, leading to the release of a mature ovum during ovulation. This process is essential for successful reproduction. Choice A is incorrect because the development of the uterine endometrium is primarily influenced by estrogen and progesterone. Choice B is incorrect as the release of the mature ovum is triggered by the surge in luteinizing hormone (LH), not FSH. Choice D is incorrect as the development of the ovary itself is not a direct function of FSH.
The phase of the menstrual cycle that occurs between the expulsion of the ovum from the ovary and the onset of menses is the _____ phase.
- A. Proliferative
- B. Follicular
- C. Luteal
- D. Estrogenic
Correct Answer: C
Rationale: The luteal phase occurs after ovulation and before the onset of menses.
The layer of uterine muscle that is most active during labor is composed of fibers is which of the following?
- A. Longitudinal
- B. Interlacing
- C. Circular
- D. NA
Correct Answer: A
Rationale: The longitudinal muscle fibers of the uterus are primarily responsible for the strong contractions during labor.