ATI RN
ATI RN Custom Exams Set 1
1. Warfarin (Coumadin) is an anticoagulant and interferes with the action of:
- A. Platelets
- B. Vitamin K
- C. Calcium
- D. Vitamin B12
Correct answer: B
Rationale: The correct answer is B: Vitamin K. Warfarin works by inhibiting the action of vitamin K, which is crucial for the synthesis of clotting factors in the blood. By interfering with vitamin K, warfarin decreases the production of these clotting factors, thereby prolonging the time it takes for blood to clot. This is why individuals on warfarin therapy need to monitor their vitamin K intake. Choices A, C, and D are incorrect because warfarin does not directly interfere with platelets, calcium, or vitamin B12.
2. A patient is administered a nucleotide reverse transcriptase inhibitor in combination with a nonnucleotide reverse transcriptase inhibitor. What is the main rationale for administering these medications together?
- A. They improve treatment adherence.
- B. They reduce the duration of illness.
- C. They exhibit synergistic antiviral effects.
- D. They prevent opportunistic infections.
Correct answer: C
Rationale: The main rationale for administering a nucleotide reverse transcriptase inhibitor in combination with a nonnucleotide reverse transcriptase inhibitor is that they exhibit synergistic antiviral effects when used together. This combination enhances their antiviral activity against HIV by targeting different steps in the viral replication cycle. Choice A is incorrect because the rationale for combining these medications is based on their antiviral effects, not treatment adherence. Choice B is incorrect because the primary purpose of combination therapy is not to reduce the duration of illness but to improve treatment efficacy. Choice D is incorrect as the main focus of this combination is not on preventing opportunistic infections but on directly targeting the HIV virus.
3. What function does aldosterone serve in the body?
- A. Aldosterone causes a release of sodium from the body, decreases fluid volume, and decreases blood pressure
- B. Aldosterone causes a retention of sodium in the body, increases fluid volume, and increases blood pressure
- C. Aldosterone causes a release of sodium from the body, increases fluid volume, and decreases blood pressure
- D. Aldosterone enhances intracellular sodium production and lowers blood pressure
Correct answer: B
Rationale: Aldosterone functions by causing the retention of sodium in the body, which results in an increase in fluid volume and blood pressure. Choice A is incorrect because aldosterone actually promotes sodium retention rather than release. Choice C is incorrect as it states that aldosterone decreases fluid volume, which is not accurate. Choice D is incorrect because aldosterone does not enhance intracellular sodium production; instead, it primarily acts on sodium reabsorption in the kidneys.
4. Which of the following tests can be used to diagnose ulcers?
- A. Abdominal x-ray
- B. Barium swallow
- C. Computed tomography (CT) scan
- D. Esophagogastroduodenoscopy (EGD)
Correct answer: D
Rationale: Esophagogastroduodenoscopy (EGD) is a diagnostic test that involves visualizing the esophagus, stomach, and duodenum to diagnose ulcers.
5. Freud's psychosexual stage that occurs between the ages of 3 and 5 is the ________ stage.
- A. oral
- B. anal
- C. phallic
- D. genital
Correct answer: C
Rationale: Freud's psychosexual stage that occurs between the ages of 3 and 5 is the phallic stage. During this stage, children focus on the genitals and start to identify with the same-sex parent while developing the superego. Choice A, the oral stage, occurs during infancy (0-1 year), where gratification is centered around the mouth. Choice B, the anal stage, occurs between the ages of 1 and 3, focusing on toilet training. Choice D, the genital stage, is the final stage in Freud's theory, occurring from puberty onwards, where the focus is on mature sexual relationships.