ATI RN
Final Exam Pathophysiology
1. A patient has developed a decubitus ulcer on the coccyx. What defense mechanism is most affected by this homeostatic change?
- A. The mucous membrane is affected.
- B. The respiratory tract is affected.
- C. The skin is affected.
- D. The gastrointestinal tract is affected.
Correct answer: C
Rationale: In this scenario, a decubitus ulcer on the coccyx indicates a breakdown of the skin's integrity due to prolonged pressure. The skin is the primary defense mechanism of the body against external pathogens. When the skin is compromised, it can lead to infections and other complications. The mucous membrane (Choice A) plays a role in protecting internal surfaces, not the skin. The respiratory tract (Choice B) is involved in breathing and not directly related to the skin's defense. The gastrointestinal tract (Choice D) is responsible for digestion and absorption of nutrients, not the primary defense mechanism against external threats like the skin.
2. A patient is starting on oral contraceptives. What should the nurse emphasize about the importance of taking the medication at the same time each day?
- A. Taking the medication at the same time each day helps maintain stable hormone levels and ensures effectiveness.
- B. Taking the medication at the same time each day reduces the risk of breakthrough bleeding.
- C. Taking the medication at the same time each day ensures consistent absorption and effectiveness.
- D. Taking the medication at the same time each day is important, but missing a dose occasionally is not a concern.
Correct answer: A
Rationale: The correct answer is A. Taking oral contraceptives at the same time each day helps maintain stable hormone levels and ensures their effectiveness in preventing pregnancy. Choice B is incorrect because the primary emphasis of consistent timing is on hormone levels and effectiveness, not on reducing breakthrough bleeding. Choice C is incorrect because while consistent absorption is a factor, the main focus is on maintaining stable hormone levels. Choice D is incorrect as missing doses can significantly impact contraceptive efficacy.
3. How does tamsulosin (Flomax) primarily benefit male patients with benign prostatic hyperplasia (BPH)?
- A. Relaxation of the muscles in the prostate and bladder neck, leading to improved urinary flow.
- B. Reduction in prostate size and improvement in urinary symptoms.
- C. Increase in urine flow and relief of urinary obstruction.
- D. Improvement in erectile function.
Correct answer: A
Rationale: The correct answer is A: Tamsulosin works by relaxing the muscles in the prostate and bladder neck, which helps improve urinary flow in patients with BPH. This relaxation reduces the symptoms associated with BPH, such as urinary hesitancy, urgency, and frequency. Choice B is incorrect because tamsulosin does not directly reduce the size of the prostate gland. Choice C is incorrect as while tamsulosin does improve urine flow, its primary mechanism of action is through muscle relaxation rather than directly relieving obstruction. Choice D is incorrect as tamsulosin is not indicated for improving erectile function; its main therapeutic effect is targeted towards urinary symptoms related to BPH.
4. A male patient with benign prostatic hyperplasia (BPH) is prescribed finasteride (Proscar). What is the expected therapeutic effect of this medication?
- A. Decreased urinary frequency and urgency
- B. Decreased blood pressure
- C. Increased urinary output
- D. Increased hair growth
Correct answer: A
Rationale: The correct answer is A: Decreased urinary frequency and urgency. Finasteride is used to reduce the size of the prostate gland in patients with BPH, which helps alleviate symptoms such as urinary frequency and urgency. Choice B, decreased blood pressure, is incorrect because finasteride is not indicated for lowering blood pressure. Choice C, increased urinary output, is incorrect as finasteride does not typically increase urine production. Choice D, increased hair growth, is incorrect as the primary use of finasteride is not for promoting hair growth but rather for treating BPH.
5. A patient is prescribed medroxyprogesterone acetate (Provera) for the treatment of endometriosis. What key instruction should the nurse provide regarding the administration of this medication?
- A. Take the medication at the same time each day to maintain consistent hormone levels.
- B. Discontinue the medication if side effects occur.
- C. Take the medication with food to prevent gastrointestinal upset.
- D. Apply the medication once a week.
Correct answer: A
Rationale: The correct instruction for medroxyprogesterone acetate (Provera) is to take the medication at the same time each day to maintain consistent hormone levels and ensure its effectiveness. Choice B is incorrect because discontinuing the medication abruptly without consulting healthcare providers can be harmful. Choice C is incorrect as taking the medication with food is not necessary for this specific drug. Choice D is incorrect as medroxyprogesterone is typically taken orally, not applied topically.
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