A patient complains of dysuria, yellow-green vaginal discharge, and vulvar itching. The nurse suspects which sexually transmitted disease?

Correct Answer: B

Rationale: The correct answer is B: Gonorrhea. Dysuria, yellow-green discharge, and vulvar itching are classic symptoms of gonorrhea. The causative agent, Neisseria gonorrhoeae, infects the genital tract. Syphilis (A) presents with painless sores, not discharge. Genital warts (C) are caused by human papillomavirus and present as warts, not discharge. Chlamydia (D) can cause similar symptoms, but the characteristic discharge in this case points more towards gonorrhea.

Correct Answer: C

Rationale: The correct answer is C: Propranolol (Inderal). Propranolol is a beta-blocker commonly used to treat high blood pressure, which can lead to erectile dysfunction (ED) as a side effect by affecting blood flow. The other choices, A: Ranitidine (Zantac) is an H2 blocker used for GERD; B: Atorvastatin (Lipitor) is a statin used to lower cholesterol; and D: Metformin (Glucophage) is an oral antidiabetic agent. These medications are not typically associated with causing ED.

Correct Answer: D

Rationale: Oviparity refers to the reproductive mode where organisms lay eggs that hatch outside the body. Choice D is correct as it describes frogs hatching from shell-covered fertilized eggs within the female's body. This is because frogs lay eggs externally after fertilization, and the eggs hatch into tadpoles outside the female's body. Choices A and B are incorrect as they describe viviparity, where offspring are fully developed at birth and young mammals obtain nourishment from the mother's placenta, respectively. Choice C is incorrect as it describes ovoviviparity, where embryos develop inside eggs within the mother's body but are born live.

Correct Answer: B

Rationale: The correct answer is B because FSH, or Follicle-Stimulating Hormone, stimulates spermatogenesis in males and oocyte maturation in females. In males, FSH acts on the Sertoli cells in the testes to promote the development of sperm cells. In females, FSH stimulates the growth and maturation of ovarian follicles, leading to the release of mature eggs. Choice A is incorrect because FSH is not primarily responsible for the development of gonads during early development. Choice C is incorrect because FSH does not directly increase the secretion of testosterone by the testes; that is the role of LH (Luteinizing Hormone). Choice D is incorrect because FSH does not regulate the secretion of the bulbourethral gland; that is controlled by other hormones.

Correct Answer: C

Rationale: The correct answer is C: gastrula. During the gastrula stage of embryonic development, the blastula undergoes a process called gastrulation, where the three primary germ layers - ectoderm, mesoderm, and endoderm - are formed. The ectoderm gives rise to the nervous system and skin, the mesoderm forms muscles and organs, and the endoderm develops into the lining of the digestive tract and respiratory system. Morula (A) is an earlier stage where the zygote divides into multiple cells. Blastula (B) is the stage before gastrula where a hollow ball of cells is formed. Neurula (D) is a stage specific to vertebrate embryos where the neural tube begins to form.