ATI RN
Disorders in Reproductive System Questions
Question 1 of 5
In the circulatory system of a fetus, which of the following is greater before birth than after birth?
Correct Answer: B
Rationale: The correct answer is B: Right atrial pressure. Before birth, the fetal circulatory system has a shunt called the foramen ovale that allows blood to bypass the lungs, resulting in higher pressure in the right atrium. After birth, when the foramen ovale closes, the right atrial pressure decreases. Incorrect Choices: A: Arterial Po2 - Typically, arterial Po2 is lower in the fetus due to the placenta's oxygenation, but it increases after birth. C: Aortic pressure - Aortic pressure remains relatively stable before and after birth. D: Left ventricular pressure - Left ventricular pressure increases after birth due to the transition from fetal to neonatal circulation.
Question 2 of 5
Two days before the onset of menstruation, secretions of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) reach their lowest levels. What is the cause of this low level of secretion?
Correct Answer: D
Rationale: The correct answer is D because two days before menstruation, the corpus luteum secretes estrogen, progesterone, and inhibin, which collectively suppress the hypothalamus's secretion of GnRH and the pituitary gland's secretion of FSH and LH. This hormonal feedback loop helps prepare the body for menstruation. A: The anterior pituitary gland becoming unresponsive to GnRH does not explain the low FSH and LH levels. B: Estrogen from developing follicles typically exerts a positive feedback on the hypothalamus, not inhibitory feedback. C: The rise in body temperature does not directly impact FSH and LH levels; it is more related to ovulation.
Question 3 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 4 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 5 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.