ATI RN
Reproductive System Anatomy Quizlet Questions
Question 1 of 5
The menstrual cycle is a result of
Correct Answer: C
Rationale: The correct answer is C because the menstrual cycle is the female body's way of preparing for pregnancy through ovulation and the shedding of the uterine lining if fertilization does not occur. Choice A is incorrect as menstruation is not directly related to giving birth. Choice B is incorrect as milk production occurs after childbirth, not during the menstrual cycle. Choice D is incorrect as the menstrual cycle is not related to preparing for old age, but rather for reproductive purposes.
Question 2 of 5
The production of testosterone in the interstitial cells is stimulated by
Correct Answer: B
Rationale: The correct answer is B: luteinizing hormone. Luteinizing hormone stimulates the Leydig cells in the testes to produce testosterone. Inhibin (A) regulates the production of FSH, not testosterone. Follicle-stimulating hormone (C) is responsible for sperm production in the testes, not testosterone. Thyroid-stimulating hormone (D) does not play a role in the production of testosterone.
Question 3 of 5
If a radioimmunoassay is properly conducted and the amount of radioactive hormone bound to antibody is low, this would indicate which of the following?
Correct Answer: A
Rationale: The correct answer is A: Plasma levels of endogenous hormone are high. When the amount of radioactive hormone bound to the antibody is low in a radioimmunoassay, it indicates that there is a high concentration of non-radioactive, endogenous hormone present in the sample competing for binding sites on the antibody. This competition results in fewer radioactive hormones binding to the antibody. Therefore, the low radioactive hormone binding suggests an abundance of non-radioactive hormone in the sample. Choice B is incorrect because low levels of radioactive hormone binding do not indicate low plasma levels of endogenous hormone. Choice C is incorrect as more antibody wouldn't affect the binding of radioactive hormone if endogenous hormone levels are high. Choice D is incorrect because the amount of radioactive hormone needed is not related to the binding observed in the assay.
Question 4 of 5
Giving prostaglandin E2 (PGE2) to a pregnant woman may result in an abortion. What is the best explanation for this finding?
Correct Answer: A
Rationale: The correct answer is A because prostaglandin E2 (PGE2) is known to strongly stimulate uterine contractions. This can lead to abortion by triggering premature labor and causing the expulsion of the fetus. Choice B is incorrect as PGE2 does not cause arterial constriction leading to the placenta. Choice C is incorrect because PGE2 does not stimulate the release of oxytocin; rather, oxytocin itself is a hormone that stimulates uterine contractions. Choice D is also incorrect as PGE2 does not increase progesterone secretion from the corpus luteum; in fact, PGE2 can have the opposite effect by inhibiting progesterone synthesis.
Question 5 of 5
Which of the following is produced by the trophoblast cells during the first 3 weeks of pregnancy?
Correct Answer: D
Rationale: The correct answer is D: Human chorionic gonadotropin (hCG). During the first 3 weeks of pregnancy, trophoblast cells produce hCG, which is crucial for maintaining the corpus luteum and ensuring the production of progesterone to support the early pregnancy. hCG is also the hormone detected in pregnancy tests. Rationale: A: Estrogen is mainly produced by the ovaries, not trophoblast cells in the early stages of pregnancy. B: Luteinizing hormone is produced by the pituitary gland to trigger ovulation, not by trophoblast cells. C: Oxytocin is produced by the hypothalamus and released by the pituitary gland during labor and breastfeeding, not by trophoblast cells in the early stages of pregnancy.