ATI RN
Nutrition ATI Proctored Exam
1. Each statement is true of proteins, except one. Which is the exception?
- A. Proteins are composed of building blocks called amino acids
- B. The classification of the 20 common amino acids is based on the properties of their side chains
- C. The general structure of an amino acid varies considerably
- D. Amino acids polymerize to form long chains called polypeptides
Correct answer: B
Rationale: The correct answer is B. The classification of the 20 common amino acids is not based on the properties of their side chains, but rather on the structure of their amino and carboxyl groups. These groups are consistent among all amino acids, while the side chains, also known as R groups, are what vary and give each amino acid its unique properties. Choice A is correct because proteins are indeed composed of amino acids. Choice C is incorrect because while the side chains of amino acids can vary, the general structure of an amino acid - a central carbon atom bonded to an amino group, a carboxyl group, a hydrogen atom, and a side chain - is consistent. Choice D is correct because amino acids do polymerize to form long chains called polypeptides, which can then fold into complex shapes to form proteins.
2. A nurse is reviewing the results of an arterial blood gas analysis of a client who has chronic obstructive pulmonary disease. Which of the following results should the nurse expect?
- A. PaO2 of 95 mm Hg
- B. PaCO2 of 55 mm Hg
- C. HCO3 of 24 mEq/L
- D. pH level of 7.35
Correct answer: B
Rationale: In chronic obstructive pulmonary disease, there is impaired gas exchange, leading to retention of carbon dioxide (CO2) and subsequent respiratory acidosis. A PaCO2 of 55 mm Hg is higher than the normal range (35-45 mm Hg) and is indicative of respiratory acidosis in COPD. Choices A, C, and D are not typically associated with COPD. PaO2 may be decreased, HCO3 may be elevated to compensate for acidosis, and pH may be lower than 7.35 due to respiratory acidosis in COPD.
3. As a new graduate employed in a high-volume maternity unit that uses differentiated practice as its staffing model, what can the nurse expect?
- A. Evidence-based practice guides risk management principles.
- B. Client teaching is the responsibility of the team leader.
- C. The initial level of practice responsibility will be limited.
- D. Seniority is the main determinant of client assignments.
Correct answer: C
Rationale: In a differentiated practice model, the scope of nursing practice and responsibility are tailored to different levels of experience. As a new graduate with limited experience, the nurse can expect that the initial level of practice responsibility will be limited to match their skill level and knowledge. This allows for a gradual increase in responsibilities as the nurse gains more experience and expertise. Choice A is incorrect because evidence-based practice is related to clinical decision-making, not the staffing model. Choice B is incorrect as client teaching is typically a shared responsibility among the healthcare team, not solely the team leader's. Choice D is incorrect as differentiated practice models focus on skill level and competence rather than seniority when determining client assignments.
4. A nurse is caring for a client who has a new prescription for warfarin. Which of the following laboratory tests should the nurse use to monitor the client's therapeutic response to the medication?
- A. INR
- B. aPTT
- C. Platelet count
- D. Hemoglobin A1C
Correct answer: A
Rationale: The correct answer is A: INR. The INR (International Normalized Ratio) is the laboratory test used to monitor the therapeutic response of warfarin. It helps ensure that the client's clotting time is within the desired range to prevent complications such as excessive bleeding or clotting. Choice B, aPTT (Activated Partial Thromboplastin Time), is not typically used to monitor warfarin therapy but rather for assessing heparin therapy. Choice C, Platelet count, assesses the number of platelets in the blood and is not specifically used to monitor warfarin therapy. Choice D, Hemoglobin A1C, is a test used to monitor long-term blood sugar control in diabetic patients and is not relevant to monitoring warfarin therapy.
5. In dealing with a conflict on a unit, the nurse manager decides to ask one of the staff nurses, who is not moving towards resolution, to transfer to another unit. What tactic has the manager implemented?
- A. Avoidance
- B. Withdrawal
- C. Suppression
- D. Competition
Correct answer: C
Rationale: The correct answer is C: Suppression. In this scenario, the nurse manager has implemented a suppression tactic by asking the staff nurse to transfer to another unit, which eliminates one of the conflicting parties from the current unit. This technique aims to resolve the conflict by physically separating the individuals involved. Choices A, B, and D are incorrect: Avoidance involves ignoring the conflict, withdrawal is the act of pulling out or retreating, and competition refers to a situation where one party's gain is at the expense of the other.