Which hormone causes the uterus to increase glycogen?

Correct Answer: A

Rationale: Progesterone is the correct answer because it is responsible for preparing the uterus for potential implantation by increasing glycogen levels. Progesterone promotes the growth of blood vessels and glands in the uterus, leading to increased glycogen production. FSH and LH are involved in the menstrual cycle and ovulation but do not directly impact glycogen levels in the uterus. Estrogen plays a role in the growth and thickening of the endometrial lining but does not specifically stimulate glycogen production.

Correct Answer: C

Rationale: Step-by-step rationale: 1. Leydig cells are located in the testes and are responsible for secreting testosterone. 2. Testosterone is a male sex hormone crucial for regulating various functions in the body. 3. Sertoli cells provide support for sperm development, not testosterone secretion. 4. Spermatogenic cells are involved in sperm production, not testosterone secretion. 5. Oogonia are female germ cells, not involved in testosterone secretion. Summary: Choice C (Leydig cells) is correct because they are the specific cells in the testes responsible for secreting testosterone. Choices A, B, and D are incorrect as they are associated with other functions related to reproduction and are not involved in testosterone secretion.

Correct Answer: B

Rationale: The paraurethral (Skene's) glands are responsible for secreting mucus to facilitate lubrication during sexual arousal. This mucus aids in lubricating the urethra and providing moisture for sexual intercourse. Estrogen (Choice A) is a hormone produced by the ovaries and not directly related to the function of Skene's glands. Testosterone (Choice C) and androgens (Choice D) are male sex hormones and are not involved in the secretion of mucus by Skene's glands. Therefore, the correct answer is B, mucus, as it aligns with the known function of the paraurethral glands.

Correct Answer: A

Rationale: The female reproductive system arises from Paramesonephric (Mullerian) ducts. These ducts develop into the fallopian tubes, uterus, and upper part of the vagina. Initially present in both sexes, in females, they persist and differentiate into the female reproductive organs under the influence of estrogen. Mesonephric (Wolffian) ducts develop into male reproductive structures. Aldosterone is a hormone related to electrolyte balance and has no direct role in female reproductive system development. FSH (Follicle-Stimulating Hormone) is a pituitary hormone that stimulates ovarian follicle development but does not play a role in the initial development of the female reproductive system.

Correct Answer: A

Rationale: Rationale: A chancre is a painless ulcer that is characteristic of primary syphilis infection. It usually appears on the external genitalia as a result of Treponema pallidum infection. This is distinct from the other conditions listed: Gonorrhea presents with urethritis and discharge, Trichomoniasis with vaginal discharge and irritation, and Herpes genitalis with painful vesicles or ulcers. Syphilis is the only condition among the choices that typically presents with a chancre on the external genitalia.