ATI RN
Disorders in Reproductive System Questions
Question 1 of 5
A 30-year-old woman is breast-feeding her infant. During suckling, which of the following hormonal responses is expected?
Correct Answer: C
Rationale: The correct answer is C: Increased secretion of oxytocin from the paraventricular nuclei. During breast-feeding, oxytocin is released from the paraventricular nuclei in response to suckling. Oxytocin stimulates the contraction of myoepithelial cells around the alveoli and ducts in the breast, facilitating milk ejection. This response helps in the release of milk for the infant's feeding. Rationale: - Choice A is incorrect because ADH is not directly related to breast-feeding. - Choice B is incorrect because ADH is not primarily released from the paraventricular nuclei in response to breast-feeding. - Choice D is incorrect as neurophysin is not directly involved in the hormonal response during breast-feeding.
Question 2 of 5
During the week following ovulation, the endometrium increases in thickness to 5 to 6 millimeters. What stimulates this increase in thickness?
Correct Answer: C
Rationale: The correct answer is C: Progesterone from the corpus luteum. After ovulation, the corpus luteum forms from the ruptured follicle and secretes progesterone. Progesterone is responsible for preparing the endometrium for potential implantation of a fertilized egg by increasing its thickness. Luteinizing hormone (A) triggers ovulation but does not directly affect endometrial thickness. Estrogen from the corpus luteum (B) also plays a role in preparing the endometrium but does not specifically stimulate the increase in thickness. Follicle-stimulating hormone (D) primarily regulates the development of ovarian follicles and does not directly influence endometrial thickness.
Question 3 of 5
The ducts or tubes responsible for receiving the ovulated oocyte and providing the site for fertilization are the ________.
Correct Answer: A
Rationale: The correct answer is A: uterine (fallopian) tubes. These tubes receive the ovulated oocyte from the ovary and provide the site for fertilization. The other choices are incorrect because: B: The vagina is the birth canal and site for sperm deposition, not fertilization. C: The ductus deferens is part of the male reproductive system, not involved in fertilization. D: The uterus is where the fertilized egg implants and develops into a fetus, it is not the site for fertilization.
Question 4 of 5
The primitive stem cell of spermatogenesis, which is found on the periphery of each seminiferous tubule, is called a ________.
Correct Answer: A
Rationale: The correct answer is A: spermatogonium. Spermatogonium is the primitive stem cell of spermatogenesis located at the periphery of seminiferous tubules. It undergoes mitosis to produce more spermatogonia or differentiate into primary spermatocytes. Spermatid and secondary spermatocyte are later stages in spermatogenesis, not the primitive stem cell. Primary spermatocyte is the immediate progeny of spermatogonium following differentiation.
Question 5 of 5
What effect does luteinizing hormone (LH) have on a female?
Correct Answer: D
Rationale: The correct answer is D: LH triggers ovulation in a female. LH is a hormone released by the pituitary gland that stimulates the release of an egg from the ovary during the menstrual cycle. This process is known as ovulation. It is a crucial step in the reproductive cycle of females. A: LH does not promote the enlargement of female breasts. Breast growth is primarily regulated by estrogen and progesterone. B: LH does have a significant effect on females, particularly in the reproductive system. C: While LH does contribute to the development of secondary sex characteristics in females, its main role is in triggering ovulation.