HESI RN
Biology Test
1. Which of the following best describes phenotype?
- A. The hereditary potentials and limitations of an individual
- B. The genetic makeup of an individual organism
- C. The entire complex of genes inherited from both parents
- D. All the observable characteristics of an organism
Correct answer: D
Rationale: The correct answer is D: 'All the observable characteristics of an organism.' Phenotype refers to all the observable characteristics of an organism, such as physical appearance, behavior, and other traits, which result from the interaction of its genotype with the environment. Choice A is incorrect because it describes genotype. Choice B is incorrect as it defines genotype, not phenotype. Choice C is incorrect as it refers to the genotype, the genetic information inherited from both parents, rather than the observable traits.
2. A client with a history of heart failure is admitted with severe dyspnea. Which laboratory result requires immediate intervention?
- A. Blood glucose of 150 mg/dL.
- B. Serum potassium of 3.5 mEq/L.
- C. Serum creatinine of 1.0 mg/dL.
- D. Blood urea nitrogen (BUN) of 20 mg/dL.
Correct answer: C
Rationale: The correct answer is C. A serum creatinine level of 1.0 mg/dL is within the normal range. However, in a client with heart failure and severe dyspnea, fluid retention is a significant concern. An elevated serum creatinine level may indicate impaired kidney function, which can worsen fluid overload. Therefore, immediate intervention is required to prevent further complications. Choices A, B, and D are within normal ranges and not indicative of immediate intervention in this scenario.
3. During a routine assessment, an obese 50-year-old female client expresses concern about her sexual relationship with her husband. Which is the best response by the nurse?
- A. Reassure the client that many obese individuals have concerns about sex.
- B. Remind the client that sexual relationships can be maintained regardless of weight.
- C. Determine the frequency of sexual intercourse.
- D. Ask the client to talk about specific concerns.
Correct answer: D
Rationale: The best response for the nurse is to ask the client to talk about specific concerns. This approach provides an opportunity for the client to express her worries openly, allowing the nurse to gather more detailed information for a comprehensive assessment and to address the client's concerns effectively.
4. The healthcare provider is assessing a client with chronic obstructive pulmonary disease (COPD). Which finding requires immediate intervention?
- A. Oxygen saturation of 88%.
- B. Use of accessory muscles for breathing.
- C. Respiratory rate of 26 breaths per minute.
- D. Barrel-shaped chest.
Correct answer: C
Rationale: A respiratory rate of 26 breaths per minute is an abnormal finding and indicates that the client is experiencing respiratory distress, requiring immediate intervention. This rapid respiratory rate can signify inadequate oxygenation and ventilation. Oxygen saturation of 88% is low but not as immediately concerning as a high respiratory rate, which indicates the body is compensating for respiratory distress. The use of accessory muscles for breathing and a barrel-shaped chest are typical findings in clients with COPD but do not indicate an immediate need for intervention as they are more chronic in nature and may be seen in stable COPD patients.
5. A client with a history of myocardial infarction (MI) is admitted with chest pain. Which laboratory test should the nurse expect to be ordered to determine if the client is experiencing another MI?
- A. Troponin
- B. Myoglobin
- C. CK-MB
- D. C-reactive protein
Correct answer: A
Rationale: Troponin is the most specific and sensitive laboratory test for detecting myocardial infarction (MI). It is released when there is damage to the heart muscle, making it a valuable marker for diagnosing another MI. Myoglobin and CK-MB can also be elevated in MI, but troponin is preferred due to its higher specificity. C-reactive protein is a marker of inflammation and not specific to MI.
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