The menstrual cycle lasts on average 28 days. Day 1 is the first day that ___________ starts, and usually finishes by day 5

Correct Answer: D

Rationale: The correct answer is D: menstruation. Day 1 of the menstrual cycle is the first day of menstruation, which typically lasts around 3-7 days. Menstruation is the shedding of the uterine lining when pregnancy has not occurred. This marks the beginning of a new cycle. Menopause (A) is the cessation of menstruation and fertility typically occurring in women in their 40s-50s. Ovulation (B) is the release of an egg from the ovary, usually occurring around day 14 of the cycle. Implantation (C) is the attachment of a fertilized egg to the uterus, which occurs around 6-10 days after ovulation.

Correct Answer: D

Rationale: The correct answer is D: seminal vesicles. Seminal vesicles are accessory glands that produce a significant portion of the fluid that makes up semen. They contribute nutrients and substances that support sperm viability and motility. Choices A, B, and C are incorrect as they are structures of the penis involved in erection and urination, not accessory glands of the male reproductive system.

Correct Answer: A

Rationale: Step-by-step rationale for choice A being correct: 1. Sperm cells need to be mobile to reach the egg for fertilization. 2. Seminal fluid provides the environment for sperm motility. 3. Sperm cells acquire motility in the seminal fluid due to specific nutrients and ions present. Summary of why other choices are incorrect: - Choice B: Being microscopic is a general characteristic of sperm cells but not specific to their mobility. - Choice C: Sperm cells are stored in the epididymis, not the "crotum." - Choice D: Sperm cells are all of the same kind, not three different kinds.

Correct Answer: C

Rationale: Step 1: The ovary is a complex organ with distinct internal structures. Step 2: The ovarian cortex houses ovarian follicles, which are crucial for reproductive functions. Step 3: Ovarian follicles contain oocytes and support cells for oocyte development. Step 4: Therefore, choice C is correct as it accurately describes the structural aspect of the ovary. Summary: Choices A, B, and D are incorrect as they do not accurately describe the structural components of the ovary. Choice A talks about elastic tissue, choice B mentions glandular parenchyma, and choice D refers to blood vessels, none of which are specific to the structural arrangement of the ovary.

Correct Answer: D

Rationale: Step-by-step rationale for why choice D is correct: 1. The lateral extremity of the Fallopian tube is connected to the uterus through the uterine ostium. 2. This connection allows the passage of the ovum from the Fallopian tube to the uterus for implantation. 3. The uterine ostium serves as the entry point for the ovum to travel from the Fallopian tube to the uterus. 4. Therefore, choice D is correct as it accurately describes the anatomical connection between the Fallopian tube and the uterus. Summary: - Choice A is incorrect because the lateral extremity of the Fallopian tube does not open in the abdominal cavity. - Choice B is incorrect because the Fallopian tube does not capture the ovule released by the ovary. - Choice C is incorrect because the lateral extremity of the Fallopian tube does not display flared edges. - Choice D is correct as it accurately describes the anatomical connection