the renin angiotensin aldosterone system plays an important role in maintaining blood pressure which compound in this system is most powerful at raisi the renin angiotensin aldosterone system plays an important role in maintaining blood pressure which compound in this system is most powerful at raisi
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ATI RN

ATI Pediatrics Proctored Exam 2023

1. The renin-angiotensin-aldosterone system plays an important role in maintaining blood pressure. Which compound in this system is most powerful at raising blood pressure?

Correct answer: B

Rationale: Angiotensin II is the most potent compound in the renin-angiotensin-aldosterone system for raising blood pressure. It acts as a powerful vasoconstrictor, leading to increased systemic vascular resistance. Angiotensin II is formed from angiotensin I through the action of the angiotensin-converting enzyme. While renin initiates the cascade by converting angiotensinogen to angiotensin I, it is angiotensin II that exerts the strongest pressor effect.

2. The nurse is reviewing the home medication list with the patient. The nurse recognizes that hydrochlorothiazide is used primarily for which condition?

Correct answer: A

Rationale: Hydrochlorothiazide is primarily indicated for hypertension (HTN). Thiazides like hydrochlorothiazide are commonly the first-line treatment for hypertension. While hydrochlorothiazide can be used for edema, diabetes insipidus, and postmenopausal osteoporosis to some extent, its main use and efficacy lie in managing hypertension.

3. A client who is in her second trimester of pregnancy should increase her caloric intake by how many calories during this trimester?

Correct answer: 340 cal/day

Rationale: During the second trimester of pregnancy, it is recommended that a client increases their caloric intake by around 340 calories per day to support the growing needs of both the mother and the developing fetus. This additional intake helps ensure the proper nutrition and energy levels required during this crucial stage of pregnancy. Option A (110 cal/day) is too low to meet the increased demands. Option B (225 cal/day) is also below the recommended amount. Option D (450 cal/day) is higher than necessary and could lead to excessive weight gain, which is not ideal during pregnancy.

4. A 40-year-old man has been living with HIV for several years but experienced a significant decrease in his CD4+ levels a few months ago. The patient has just been diagnosed with Mycobacterium avium complex disease. The nurse should anticipate administering which of the following medications?

Correct answer: A

Rationale: The correct answer is A: Clarithromycin. In the case of Mycobacterium avium complex disease, a common treatment regimen includes a macrolide antibiotic like clarithromycin or azithromycin in combination with other antimicrobials. Clarithromycin is a key component of the treatment due to its effectiveness against Mycobacterium avium complex. Choice B (Pyrazinamide) is not typically part of the standard treatment for this condition. Choice C (Rifapentine) is mainly used in tuberculosis treatment and is not a primary agent for Mycobacterium avium complex disease. Choice D (Azithromycin) is another suitable macrolide antibiotic for treating Mycobacterium avium complex disease but is not the medication typically used first-line.

5. A 21-year-old female was recently diagnosed with iron deficiency anemia. In addition to fatigue and weakness, which of the following clinical signs and symptoms would she most likely exhibit?

Correct answer: B

Rationale: The correct answer is B: Spoon-shaped nails. In iron deficiency anemia, spoon-shaped nails (koilonychia) are a common symptom due to changes in the nail bed. This condition is known as Plummer-Vinson syndrome. While fatigue and weakness are common in iron deficiency anemia, hyperactivity (choice A) is not typically associated with this condition. Gait problems (choice C) and petechiae (choice D) are more commonly seen in other medical conditions and are not characteristic of iron deficiency anemia.

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