The hormone that promotes a small protrudes into the vagina is the number of primary follicles within the ________. ovary to grow and mature each month

Correct Answer: D

Rationale: The correct answer is D: hymen. The hormone that promotes the growth and maturation of primary follicles in the ovary each month is follicle-stimulating hormone (FSH), not luteinizing hormone (LH) as mentioned in choice C. Choices A and B are anatomical structures not related to follicular development. The hymen is a thin membrane at the vaginal opening and has no direct role in promoting follicle growth. However, it is the most related choice as it is the only one that is a part of the female reproductive system.

Correct Answer: C

Rationale: The correct answer is C: second. An embryo is known as a fetus during parturition by the second week of pregnancy. This is because by the end of the eighth week of gestation, the embryo has developed all major organs and structures, transitioning to the fetal stage. Choice A is incorrect because oxytocin increases during labor, not by the second week of pregnancy. Choice B is incorrect as the first contractions of the uterus occur during labor, not during the second week of pregnancy. Choice D is incorrect as oxytocin actually promotes uterine contractions during labor.

Correct Answer: D

Rationale: The correct answer is D because the primary oocyte completes its first meiotic division just before fertilization. This occurs when the oocyte is released from the ovary during ovulation. The meiotic division is completed when the sperm penetrates the oocyte, forming a zygote. Choices A, B, and C are incorrect because the primary oocyte does not complete its first meiotic division during fetal development, just after ovulation, or just before ovulation.

Correct Answer: D

Rationale: Rationale: 1. Leydig cells are located in the testes and are responsible for secreting testosterone. 2. Testosterone is a male sex hormone crucial for the development of male reproductive tissues. 3. Spermatocytes and oocytes are involved in gamete production, not testosterone secretion. 4. Anterior pituitary cells secrete hormones like FSH and LH, not testosterone. Summary: Leydig cells secrete testosterone in the testes, making them the correct choice. Spermatocytes, oocytes, and anterior pituitary cells are not involved in testosterone secretion.

Correct Answer: A

Rationale: The correct answer is A: Breast. The mammary glands, also known as breasts, are located at the chest level and produce milk for the newborn baby. This is a basic anatomical fact. B: Ovary is incorrect as ovaries are reproductive organs in females that produce eggs, not milk. C: Cervix is incorrect as it is a part of the female reproductive system that connects the vagina to the uterus, not involved in milk production. D: Zygote is incorrect as it is the initial cell formed from the fusion of sperm and egg during fertilization, not related to milk production.