ATI RN
The Human Reproductive System Questions
Question 1 of 5
Sexual feelings are normal and necessary
Correct Answer: A
Rationale: The correct answer is A because sexual feelings are indeed necessary for reproduction to occur. Sexual arousal and desire play a vital role in initiating the process of conception and ensuring the continuation of the human species. Without sexual feelings, procreation would not be possible. Explanation for why the other choices are incorrect: B: Sexual feelings are not necessary for the heart and lungs to function properly. These bodily functions are regulated by the autonomic nervous system, not by sexual arousal. C: While sexual feelings can influence the release of an ovum during ovulation, they are not the sole factor. Ovulation can occur without sexual arousal. D: Sexual feelings are not a requirement for teenagers to become adults. Puberty and the physical and emotional changes that come with it mark the transition from adolescence to adulthood, not sexual feelings.
Question 2 of 5
Which of the following represents metrorrhagia?
Correct Answer: D
Rationale: Metrorrhagia is defined as irregular bleeding between periods. Choice D is correct because it accurately describes the characteristic of metrorrhagia. Choice A is incorrect because fewer than 21 days between menses refers to polymenorrhea. Choice B is incorrect as excessive flow is known as menorrhagia. Choice C is incorrect because infrequent bleeding is termed oligomenorrhea.
Question 3 of 5
Within minutes following a normal delivery, flow through the foramen ovale decreases dramatically. What is the cause of this change?
Correct Answer: C
Rationale: Step-by-step rationale for the correct answer (C): 1. After delivery, the baby takes its first breath, increasing oxygen levels. 2. This leads to the closure of the foramen ovale to shift blood flow from the right to the left side. 3. Increased left atrial pressure occurs due to increased blood returning from the lungs. 4. This pressure change causes the foramen ovale to close. Summary of incorrect choices: A: Increased prostaglandin E2 does not directly affect flow through the foramen ovale. B: Increased flow through the pulmonary artery is expected after birth, but it does not directly impact the foramen ovale. D: Increased right atrial pressure would not cause a decrease in flow through the foramen ovale.
Question 4 of 5
In order for male differentiation to occur during embryonic development, testosterone must be secreted from the testes. What stimulates the secretion of testosterone during embryonic development?
Correct Answer: B
Rationale: The correct answer is B: Human chorionic gonadotropin (hCG) stimulates the secretion of testosterone during embryonic development. hCG is produced by the developing embryo and acts on the Leydig cells in the testes to trigger the production of testosterone. This hormone plays a crucial role in male differentiation by promoting the development of male reproductive organs. A: Luteinizing hormone (LH) from the maternal pituitary gland is not involved in the early stages of male differentiation in the embryo. LH is typically involved in the regulation of testosterone production postnatally. C: Inhibin from the corpus luteum is not involved in the stimulation of testosterone secretion during embryonic development. Inhibin is mainly involved in the negative feedback regulation of FSH secretion. D: Gonadotropin-releasing hormone (GnRH) from the embryo's hypothalamus is not responsible for directly stimulating testosterone secretion during embryonic development. GnRH regulates the secretion
Question 5 of 5
Following ejaculation, arterial blood flow into the corpora cavernosa decreases back to the normal resting level resulting in the flaccid state. What is the best explanation for this decrease in blood flow?
Correct Answer: C
Rationale: The correct answer is C because the resistance of the arterioles supplying the corpora cavernosa increases. This occurs due to the contraction of smooth muscle in the arterioles stimulated by sympathetic nervous system activity post-ejaculation. This constriction of arterioles reduces blood flow into the corpora cavernosa, leading to the flaccid state. Choice A is incorrect because systemic arterial pressure does not decrease significantly post-ejaculation. Choice B is incorrect as decreased sympathetic stimulation would actually lead to vasodilation, not vasoconstriction. Choice D is incorrect because the release of nitric oxide by the parasympathetic nervous system would lead to vasodilation, not vasoconstriction.