Which phase of the ovarian cycle is dominated by follicle growth?

Correct Answer: B

Rationale: The correct answer is B: Follicular phase. This phase of the ovarian cycle is characterized by the development and maturation of ovarian follicles, which contain the eggs. During this phase, the primary follicle develops into the secondary and then the mature Graafian follicle. This is when follicle-stimulating hormone (FSH) stimulates the growth of the follicles. The other choices, such as A (Luteal phase), C (Secretory phase), and D (Proliferative phase), do not involve follicle growth. The luteal phase follows ovulation and is characterized by the development of the corpus luteum. The secretory phase is part of the uterine cycle, involving endometrial preparation for implantation. The proliferative phase is also part of the uterine cycle, involving endometrial thickening under the influence of estrogen.

Correct Answer: A

Rationale: Progesterone is the correct answer because it is responsible for preparing the uterus for pregnancy by creating a favorable environment for implantation and maintaining the uterine lining. Progesterone also helps prevent contractions of the uterus that could lead to the shedding of the uterine lining. Estrogen, FSH, and LH do not directly prepare the uterus for pregnancy but play roles in follicle development and ovulation.

Correct Answer: B

Rationale: The correct answer is B: Luteal phase. Following ovulation, the ruptured follicle transforms into the corpus luteum, which secretes progesterone to prepare the uterine lining for potential implantation. This phase typically lasts around 14 days. The other choices are incorrect because: A: Menstrual phase occurs at the beginning of the cycle with shedding of the uterine lining. C: Proliferative phase occurs before ovulation, characterized by the thickening of the uterine lining. D: Follicular phase occurs before ovulation, characterized by the development of ovarian follicles.

Correct Answer: A

Rationale: The correct answer is A: Transport eggs from the ovaries to the uterus. The fallopian tubes serve as the pathway for the egg released by the ovary to travel towards the uterus for potential fertilization. This transportation process is essential for successful conception. Choices B, C, and D are incorrect because the fallopian tubes do not produce eggs, support implantation, or secrete estrogen. Eggs are produced in the ovaries, implantation occurs in the uterus, and estrogen is primarily produced by the ovaries and other endocrine glands.

Correct Answer: A

Rationale: The correct order of the stages of labor is Dilation, Expulsion, Placental (Choice A). Firstly, dilation refers to the opening of the cervix to allow the baby to pass through. Secondly, expulsion is when the baby is delivered. Lastly, the placental stage involves the delivery of the placenta after the baby is born. This sequence is crucial for a safe delivery and recovery. Choices B, C, and D are incorrect because they do not follow the natural progression of labor stages and may lead to complications if followed.