Nokea
The secondary oocyte completes its second meiotic division
- A. just after fertilization
- B. just after ovulation
- C. just before fertilization
- D. just before ovulation
Correct Answer: A
Rationale: The correct answer is A: just after fertilization. After fertilization, the secondary oocyte completes its second meiotic division, forming a mature ovum and a polar body. This process occurs to ensure the correct chromosome number in the resulting zygote. Choices B, C, and D are incorrect because the completion of the second meiotic division occurs specifically after fertilization, not before or just after ovulation or fertilization.
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How many chromosomes are present in a sperm?
- A. 1
- B. 2
- C. 12
- D. 23
Correct Answer: D
Rationale: The correct answer is D: 23. Sperm cells are haploid, meaning they contain half the number of chromosomes as normal body cells. In humans, normal body cells have 46 chromosomes (23 pairs), while sperm cells have only 23 chromosomes. This is essential for maintaining the correct chromosome number after fertilization.
A: 1 - Incorrect. Sperm cells cannot have only 1 chromosome as they need to contribute genetic material during fertilization.
B: 2 - Incorrect. Having only 2 chromosomes would not provide sufficient genetic diversity for offspring.
C: 12 - Incorrect. This number does not align with the haploid nature of sperm cells in humans with 23 chromosomes.
What is the cause of menopause?
- A. Reduced levels of gonadotropic hormones secreted from the anterior pituitary gland
- B. Reduced responsiveness of the follicles to the stimulatory effects of gonadotropic hormones
- C. Reduced rate of secretion of progesterone from the corpus luteum
- D. Reduced numbers of follicles available in the ovary for stimulation by gonadotropic hormones
Correct Answer: D
Rationale: The correct answer is D because menopause occurs when the ovaries run out of follicles, which are needed for ovulation and hormone production. This leads to reduced estrogen levels and cessation of menstrual cycles. Choices A and B focus on hormone levels and follicle responsiveness, not the actual follicle count. Choice C is incorrect as progesterone is mainly produced by the corpus luteum after ovulation, not the primary cause of menopause.
Uterine tubes are otherwise called as
- A. Vas deferens
- B. Epididymis
- C. Fallopian tubes
- D. Vagina
Correct Answer: C
Rationale: The correct answer is C: Fallopian tubes. These tubes are also known as uterine tubes because they connect the ovaries to the uterus, allowing eggs to travel from the ovaries to the uterus. The other choices are incorrect because:
A: Vas deferens is a tube that carries sperm from the epididymis to the urethra in males.
B: Epididymis is a coiled tube located on the back of each testicle where sperm mature.
D: Vagina is the muscular tube that connects the cervix to the external genitalia in females.
Of the two functional areas of the years of age is known as ________. It blastocyst, the three primary germ is during this time that the reproductive layers form from the ________. organs grow to their adult size and
- A. amnion become functional under the influence
- B. morula of hormones.
- C. inner cell mass
- D. adulthood
Correct Answer: D
Rationale: The correct answer is D: adulthood. The question is referring to the two functional areas of life - childhood and adulthood. During adulthood, organs grow to their adult size and mature, reproductive organs become functional under the influence of hormones.
A: amnion become functional under the influence - Incorrect. Amnion is a membrane surrounding the embryo, not related to the functional areas of age.
B: morula of hormones - Incorrect. Morula is an early stage of embryonic development, not related to the functional areas of age.
C: inner cell mass - Incorrect. Inner cell mass is a part of the blastocyst, not related to the functional areas of age.
The process when the ovarian follicle ruptures and releases an ovum is called ___________.
- A. Menopause
- B. ovulation
- C. Implantation
- D. Breast
Correct Answer: B
Rationale: The correct answer is B: ovulation. Ovulation is the process where the ovarian follicle ruptures and releases an ovum. This occurs around the middle of the menstrual cycle. Menopause (A) is the cessation of menstrual periods, not the release of an ovum. Implantation (C) is the attachment of a fertilized egg to the uterine wall, not the release of an ovum. Breast (D) is not related to the process of ovulation.