HESI RN
Biology Test
1. Which cell structure is responsible for efficiently packaging DNA into a small volume to fit into the nucleus of a cell and protect the DNA structure and sequence?
- A. Golgi apparatus
- B. Chromatin
- C. Smooth endoplasmic reticulum
- D. Mitochondria
Correct answer: B
Rationale: The correct answer is B: Chromatin. Chromatin is responsible for packaging DNA into a more compact, dense shape to fit into the nucleus of a cell. This compact packaging helps protect the DNA structure and regulate gene expression. The Golgi apparatus is involved in modifying, sorting, and packaging proteins. The smooth endoplasmic reticulum is involved in lipid metabolism and detoxification. Mitochondria are known as the powerhouse of the cell, producing energy in the form of ATP.
2. A client with hypertension is being seen in a community clinic. The nurse notes that the client has not been taking their prescribed medication regularly. What is the most appropriate initial intervention?
- A. Educate the client on the importance of medication adherence
- B. Explore the reasons for non-adherence with the client
- C. Refer the client to a hypertension specialist
- D. Adjust the client's medication regimen
Correct answer: B
Rationale: The most appropriate initial intervention when a client is not adhering to prescribed medication is to explore the reasons for non-adherence with the client. Understanding the client's perspective can help identify barriers to adherence, such as side effects, cost, forgetfulness, or misunderstanding of the treatment. By addressing these reasons, the nurse can work collaboratively with the client to develop strategies to improve medication compliance. Educating the client on the importance of adherence (Choice A) may be necessary but should come after exploring the reasons for non-adherence. Referring the client to a hypertension specialist (Choice C) or adjusting the medication regimen (Choice D) should be considered after addressing the underlying reasons for non-adherence.
3. When should a mother introduce solid foods to her 4-month-old baby girl? The mother states, 'My mother says I should put rice cereal in the baby's bottle now.' The nurse should instruct the mother to introduce solid foods when her child exhibits which behavior?
- A. Stops rooting when hungry
- B. Opens mouth when food comes her way
- C. Awakens once for nighttime feedings
- D. Gives up a bottle for a cup
Correct answer: B
Rationale: The correct answer is B: 'Opens mouth when food comes her way.' This behavior indicates readiness to start trying solid foods. Infants should be introduced to solid foods based on developmental cues, such as showing an interest in food and the ability to accept it. Choices A, C, and D are not indicative of readiness for solid foods. Stopping rooting when hungry is a reflex that may persist beyond the readiness for solids. Awakening for nighttime feedings is a normal behavior for a 4-month-old, and transitioning from a bottle to a cup is a later developmental milestone.
4. The nurse is caring for a client following a craniotomy. Which finding should the nurse report immediately?
- A. Pupils equal and reactive to light.
- B. Sudden increase in urine output.
- C. Diminished breath sounds bilaterally.
- D. Increase in blood pressure by 20 mmHg.
Correct answer: C
Rationale: The correct answer is C, 'Diminished breath sounds bilaterally.' This finding should be reported immediately as it could indicate a serious complication such as increased intracranial pressure or respiratory compromise. In a post-craniotomy client, changes in breath sounds may be a sign of developing issues that need prompt intervention. Choices A, B, and D are not as critical in the immediate post-craniotomy period. Pupils equal and reactive to light are expected findings, a sudden increase in urine output may require monitoring but not immediate reporting, and a small increase in blood pressure may not be alarming unless it is significantly high or accompanied by other concerning signs.
5. A client with end-stage renal disease (ESRD) is scheduled for hemodialysis. Which laboratory value should the nurse report to the healthcare provider immediately?
- A. Serum potassium of 5.5 mEq/L
- B. Serum calcium of 8 mg/dL
- C. Serum creatinine of 2.0 mg/dL
- D. White blood cell count of 10,000/mm³
Correct answer: A
Rationale: A serum potassium level of 5.5 mEq/L is concerning in a client with ESRD scheduled for hemodialysis as it indicates hyperkalemia, requiring immediate intervention. Hyperkalemia can lead to serious cardiac arrhythmias, especially during hemodialysis. Serum calcium, serum creatinine, and white blood cell count, while important, do not pose immediate life-threatening risks like hyperkalemia.