The cell labeled H in the figure secretes which of the following hormones?

Correct Answer: C

Rationale: The correct answer is C: aldosterone. The cell labeled H is located in the adrenal gland zona glomerulosa, which secretes aldosterone. Aldosterone regulates electrolyte balance by increasing reabsorption of sodium and water in the kidneys. Renin (A) is secreted by the juxtaglomerular cells, progesterone (B) is produced by the ovaries and adrenal glands, and estrogen (D) is produced by the ovaries and placenta. None of these hormones are secreted by the cell labeled H.

Correct Answer: B

Rationale: The correct answer is B: Ovulation. Ovulation is the process of the release of the mature egg (ovum) from the ovary. During ovulation, the egg is released into the fallopian tube where it can potentially be fertilized by sperm. Dessication (A) refers to the process of drying out, Fenestration (C) is the creation of an opening or hole, and Maturation (D) is the process of becoming mature. Therefore, the correct term specifically related to the release of the egg from the ovary is ovulation.

Correct Answer: B

Rationale: The correct answer is B: Vulva. The term "vener/o" specifically refers to the external female genitalia, which includes the labia, clitoris, vaginal opening, and other structures collectively known as the vulva. The term does not refer to the vagina (A), which is the internal canal leading to the cervix. It also does not refer to sexual intercourse (C), which is the act of engaging in sexual activity. Lastly, it is not related to the hymen (D), which is a thin membrane partially covering the vaginal opening. Therefore, based on the definition and context of the term "vener/o," the correct answer is B: Vulva.

Correct Answer: D

Rationale: The correct answer is D, Testosterone. The luteinizing hormone acts on the interstitial cells in the testes to stimulate the production of testosterone. Testosterone is a male sex hormone responsible for the development of male reproductive tissues and characteristics. Androgen (choice A) is a broad term that includes testosterone, so it is not specific enough. Estrogen (choice B) and Progestin (choice C) are female sex hormones and are not produced by the interstitial cells in response to luteinizing hormone. Hence, the correct answer is D.

Correct Answer: B

Rationale: The correct answer is B: Periosteum. The periosteum is the outer fibrous vascular membrane that covers the surface of a long bone. It plays a crucial role in bone growth, repair, and nutrition. The endomysium (A) is a connective tissue sheath that surrounds individual muscle fibers, not bones. The perimysium (C) is a connective tissue sheath that surrounds bundles of muscle fibers, not bones. The endosteum (D) is a thin membrane that lines the inner surface of bones, not the outer surface. Therefore, the periosteum is the correct choice for the outer fibrous vascular membrane covering a long bone.