Which hormone is produced throughout a menstrual cycle?

Correct Answer: B

Rationale: The correct answer is B: estrogen. Estrogen is produced throughout the menstrual cycle by the ovaries. It plays a key role in regulating the menstrual cycle, promoting the growth of the uterine lining, and preparing the body for ovulation. FSH and LH are involved in stimulating the ovaries to produce estrogen and progesterone, respectively. Progesterone is mainly produced in the second half of the menstrual cycle, after ovulation, to support pregnancy. Therefore, estrogen is the hormone that is produced consistently throughout the menstrual cycle, making it the correct answer.

Correct Answer: A

Rationale: The correct answer is A: Placenta. The placenta is a temporary organ that connects a mammalian mother to its foetus by facilitating the exchange of nutrients, gases, and waste products between the mother and the developing baby. It also produces hormones necessary for pregnancy. Explanation of other choices: B: Chorion - The chorion is a membrane that surrounds the embryo and contributes to the formation of the placenta, but it is not the organ that directly connects the mother to the foetus. C: Endometrium - The endometrium is the inner lining of the uterus where implantation of the fertilized egg occurs, but it is not the organ that connects the mother to the foetus. D: None of the above - This choice is incorrect as the placenta is indeed the temporary organ that serves as the connection between the mother and the foetus in mammalian reproduction.

Correct Answer: D

Rationale: The correct answer is D because the ovaries produce secondary oocytes, which are released during ovulation for fertilization. Additionally, the ovaries produce estrogen and progesterone, which are essential for the menstrual cycle and reproductive health. Choice A is incorrect as primary oocytes are present before birth and insulin is produced by the pancreas. Choice B is incorrect because cortisol is produced by the adrenal glands, not the ovaries. Choice C is incorrect as tertiary oocytes do not exist, and insulin is produced by the pancreas.

Correct Answer: C

Rationale: The correct answer is C: Ovary. Line "C" is pointing to the ovary because it is the reproductive organ responsible for producing eggs and hormones in females. The ovary is located near the fimbriae and not the bladder or uterus. The fimbriae are finger-like projections near the ovary that help guide the released egg into the fallopian tube. The bladder is an organ unrelated to reproduction, and the uterus is a separate reproductive organ responsible for housing a developing fetus. Therefore, the correct choice is the ovary as it aligns with the function and location indicated by the diagram.

Correct Answer: A

Rationale: The correct answer is A: SRY. The Sex-determining Region Y (SRY) gene is the master switch for male development. It initiates the development of male gonads. Choice B, MIS, is a hormone involved in female reproductive development. Choices C and D, XYY and XXY, are genetic conditions related to male chromosomal variations and are not the master switch gene for male development.