foundations of nursing test bank

Correct Answer: C

Rationale: The correct answer is C because it accurately explains the physiological change in the eye that leads to the need for bifocals. As individuals age, there is a gradual thickening of the lens of the eye, which affects the eye's ability to accommodate for near vision. This thickening makes it harder for the eye to focus on close objects, necessitating the use of bifocals to correct this near vision issue. Choices A, B, and D are incorrect because they do not provide a scientifically accurate explanation for the need for bifocals in older individuals. Option A is dismissive and does not address the specific change in the eye that leads to the need for bifocals. Option B implies aging as a general concept without specifying the relevant change in the eye. Option D incorrectly states that the eye gets shorter as we age, which is not the reason for needing bifocals.

Correct Answer: B

Rationale: The correct answer is B: Total placenta previa. In this condition, the placenta completely covers the cervix, posing a risk of severe bleeding during vaginal delivery. Cesarean birth is necessary to avoid potential life-threatening complications for both the mother and the baby. Partial abruptio placentae (choice A) involves premature separation of the placenta, but it doesn't always require a cesarean birth. Ectopic pregnancy (choice C) occurs when the fertilized egg implants outside the uterus, typically requiring surgical intervention but not always a cesarean birth. Eclampsia (choice D) is a serious condition characterized by high blood pressure and seizures, but it doesn't always necessitate cesarean birth unless there are other complications that require it.

Correct Answer: C

Rationale: The correct answer is C because the severity of an anaphylactic reaction can vary greatly from one episode to another in the same patient. Anaphylactic reactions are unpredictable and can be influenced by various factors such as the amount of allergen exposure, individual immune response, underlying health conditions, and concurrent medications. Therefore, it is not possible to reliably gauge the severity of a patient's anaphylactic reaction even if it has occurred repeatedly in the past. Choice A is incorrect because the onset of symptoms alone is not a reliable predictor of the severity of the reaction. Choice B is incorrect as well because there is no set formula to predict that the reaction will be one-third more severe than the patient's last reaction. Choice D is incorrect because stating that the reaction will generally be slightly less severe than the last reaction is also not accurate or supported by evidence.

Correct Answer: B

Rationale: The correct answer is B because in Goodpasture syndrome, the patient's immune system mistakenly targets normal constituents of the body, specifically the basement membrane of the kidneys and lungs. This autoimmune response leads to inflammation and damage in these organs, resulting in respiratory and renal dysfunction. Choice A is incorrect as immune complexes are not the primary mechanism in Goodpasture syndrome. Choice C is incorrect as it refers to T cell-mediated immune responses, which are not the main drivers in this condition. Choice D is incorrect as histamine release and cell lysis are not the main processes involved in Goodpasture syndrome.

Correct Answer: B

Rationale: The correct answer is B because it shows an understanding that being HIV-positive does not guarantee transmission to the baby. The statement acknowledges the possibility of the baby not being affected, which demonstrates awareness of the varying outcomes. Choice A is incorrect as it assumes abortion is the only option. Choice C is incorrect as it makes an extreme and inaccurate claim. Choice D is incorrect as pregnancy does not decrease the chance of developing AIDS.