Arterial supply of breast include

Correct Answer: A

Rationale: The correct answer is A: Internal thoracic artery. The internal thoracic artery is a major branch of the subclavian artery and supplies the breast tissue. It gives rise to the perforating branches that supply the breast. The other choices, B, C, and D, are incorrect because the thoracoaromial artery primarily supplies the upper limb, the superior epigastric artery supplies the anterior abdominal wall, and the common carotid artery supplies the head and neck, but not the breast tissue. Therefore, based on the anatomical knowledge of arterial supply, the internal thoracic artery is the correct choice for the arterial supply of the breast.

Correct Answer: B

Rationale: The correct answer is B: epididymis. Sperm cells attain fertilization competence and motility in the epididymis. Here's the rationale: 1. Sperm cells are produced in the seminiferous tubules of the testes. 2. They then move to the epididymis for maturation, where they gain motility and the ability to fertilize an egg. 3. The epididymis provides the ideal environment for sperm to undergo final maturation processes. 4. The rete testis is a network of tubules where sperm are transported from the seminiferous tubules, not where they gain fertilization competence. 5. The vas deferens is a duct that carries sperm from the epididymis to the urethra, not where sperm attain fertilization competence.

Correct Answer: B

Rationale: The correct answer is B: seminiferous tubule. FSH (follicle-stimulating hormone) targets the seminiferous tubules in the testes to stimulate the production of sperm. FSH plays a crucial role in male reproductive function by promoting spermatogenesis. The other choices are incorrect because: A: Prostate - FSH does not directly target the prostate. C: Pituitary - FSH is secreted by the pituitary gland, it does not target the pituitary itself. D: Penis - FSH does not have a direct role in the structure or function of the penis.

Correct Answer: A

Rationale: The correct answer is A: fimbriae. Fimbriae are finger-like projections at the end of the fallopian tube that capture the released oocyte from the ovary during ovulation. The fimbriae create a gentle sweeping motion to guide the oocyte into the uterine tube for fertilization. The other choices are incorrect because the oocyte needs to be captured by the fimbriae before entering the uterine tube, infundibulum, or uterus. The fimbriae are the initial structure responsible for receiving the oocyte, making choice A the correct answer.

Correct Answer: D

Rationale: The correct answer is D: endometrium. The endometrium undergoes the most significant changes during the menstrual cycle. It thickens and sheds in response to hormonal changes for potential implantation of a fertilized egg. The vagina (A), perimetrium (B), and cervix (C) do not experience the same level of cyclic changes as the endometrium. The vagina is primarily a passageway, the perimetrium is the outer layer of the uterus, and the cervix mainly functions as an opening to the uterus. Therefore, the endometrium is the area that experiences the greatest changes in a menstrual cycle due to its role in preparing for possible pregnancy and shedding if implantation does not occur.