HESI RN
Biology Practice Test
1. Which of the following provides support and shape to the cell?
- A. Microtubules
- B. Microfilaments
- C. Cilia
- D. Microvilli
Correct answer: A
Rationale: Microtubules are fundamental components of the cytoskeleton in a cell, playing a crucial role in providing structural support and maintaining the cell's shape. They are composed of tubulin protein subunits and are involved in various cellular processes like cell division, intracellular transport, and cell motility. Microfilaments, on the other hand, are involved in cell movement and maintaining cell shape but are not primarily responsible for supporting the cell's overall structure. Cilia and microvilli are cellular projections that aid in movement and absorption, respectively, but they do not play a significant role in providing structural support to the cell.
2. The healthcare provider is assessing a client with suspected diabetes insipidus. Which of the following clinical manifestations would support this diagnosis?
- A. Polyuria and polydipsia
- B. Hypertension and bradycardia
- C. Weight gain and edema
- D. Oliguria and thirst
Correct answer: A
Rationale: Polyuria (excessive urination) and polydipsia (excessive thirst) are classic clinical manifestations of diabetes insipidus. In this condition, there is a deficiency of antidiuretic hormone, leading to the inability of the kidneys to concentrate urine effectively, resulting in increased urine output (polyuria) and consequent thirst (polydipsia). Hypertension and bradycardia (Choice B) are not typical findings in diabetes insipidus. Weight gain and edema (Choice C) are more indicative of conditions such as heart failure or nephrotic syndrome. Oliguria (decreased urine output) and thirst (Choice D) are contradictory symptoms to what is seen in diabetes insipidus.
3. When assessing the breath sounds of an 18-month-old child who is crying, what action should the healthcare professional take?
- A. Document that the assessment is not available because the child is crying.
- B. Ask the caregiver to quiet the child so breath sounds can be auscultated.
- C. Allow the child to play with a stethoscope to distract them during auscultation.
- D. Auscultate and document breath sounds, noting that the child was crying at the time.
Correct answer: C
Rationale: Allowing the child to play with a stethoscope can help distract them, making it easier to auscultate breath sounds. This approach can create a more cooperative and engaging environment for the child, facilitating a more accurate assessment of their breath sounds. Choice A is incorrect because it does not address the need for an assessment. Choice B is not ideal as it puts pressure on the caregiver and may not be effective in calming the child. Choice D is not the best option as it does not actively involve the child in the assessment process and may not provide an accurate representation of their breath sounds.
4. A patient is admitted to the hospital for treatment of pneumonia after complaining of high fever and shortness of breath. The patient was not able to produce sputum for a culture. The nurse will expect the patient’s provider to order
- A. a broad-spectrum antibiotic.
- B. a narrow-spectrum antibiotic.
- C. multiple antibiotics.
- D. the pneumococcal vaccine.
Correct answer: A
Rationale: In this scenario where the offending organism causing pneumonia is unknown due to the inability to produce sputum for culture, the appropriate choice is a broad-spectrum antibiotic. Broad-spectrum antibiotics are effective against a wide range of bacteria and are commonly used when the specific pathogen is unidentified. Narrow-spectrum antibiotics target specific types of bacteria and are chosen based on culture and sensitivity results. Using multiple antibiotics without a clear indication from culture and sensitivity testing can lead to antibiotic resistance and is not recommended in this situation. Additionally, the pneumococcal vaccine is preventive and does not treat an ongoing infection like pneumonia.
5. Nurse Louie is developing a teaching plan for a male client diagnosed with diabetes insipidus. The nurse should include information about which hormone lacking in clients with diabetes insipidus?
- A. Antidiuretic hormone (ADH)
- B. Thyroid-stimulating hormone (TSH)
- C. Follicle-stimulating hormone (FSH)
- D. Luteinizing hormone (LH)
Correct answer: A
Rationale: Diabetes insipidus is a condition characterized by a deficiency of antidiuretic hormone (ADH). ADH plays a crucial role in regulating water balance by controlling the amount of water reabsorbed by the kidneys. Options B, C, and D are incorrect as they are not associated with diabetes insipidus. TSH (thyroid-stimulating hormone) is responsible for regulating thyroid function, while FSH (follicle-stimulating hormone) and LH (luteinizing hormone) are involved in reproductive functions.
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