HESI RN
Biology Test
1. Binary fission is a type of asexual reproduction. Which of the following occurs during the binary fission process?
- A. The chromosomes bind to the plasma membrane
- B. The chromosomes attach to the spindle formed along the axis
- C. The chromosomes gather in the center of the cell
- D. The chromosomes begin to separate
Correct answer: A
Rationale: The correct answer is A. In binary fission, the chromosomes bind to the plasma membrane before the cell splits into two. This initial step ensures that each daughter cell receives a complete set of genetic material. Choice B is incorrect because the spindle apparatus is characteristic of eukaryotic cell division (mitosis), not prokaryotic binary fission. Choice C is incorrect as chromosomes do not necessarily gather in the center of the cell during binary fission. Choice D is incorrect because the chromosomes do not begin to separate in binary fission; they replicate and then move to opposite ends of the cell before division.
2. When obtaining a urine specimen from a female infant, which intervention should the nurse implement?
- A. Place the wet diaper in a biohazard specimen bag
- B. Obtain the urine sample using a straight size 4 French catheter
- C. Collect the urinary stream in mid-air when the infant cries
- D. Secure the pediatric urine collector bag to the perineum
Correct answer: D
Rationale: When obtaining a urine specimen from a female infant, securing the pediatric urine collector bag to the perineum is the most appropriate intervention. This method allows for non-invasive collection of urine without causing discomfort or distress to the infant. Placing the wet diaper in a biohazard specimen bag (Choice A) is incorrect as it does not involve collecting a fresh urine sample. Using a catheter (Choice B) is invasive and not typically necessary for routine urine specimen collection from infants. Collecting the urinary stream in mid-air when the infant cries (Choice C) is not a reliable or hygienic method of obtaining a urine specimen.
3. Which assessment finding should the healthcare provider identify as most concerning in a child with acute glomerulonephritis?
- A. Hypertension.
- B. Gross hematuria.
- C. Proteinuria.
- D. Periorbital edema.
Correct answer: A
Rationale: In a child with acute glomerulonephritis, hypertension is the most concerning assessment finding as it can indicate worsening renal function. Hypertension is a common complication of glomerulonephritis and can lead to further kidney damage if not managed promptly. Monitoring and controlling blood pressure is crucial in these cases to prevent complications and preserve renal function. Gross hematuria, proteinuria, and periorbital edema are also common findings in acute glomerulonephritis but hypertension poses a higher risk for renal damage if left uncontrolled.
4. A 20-year-old male client is diagnosed with Ewing's sarcoma following examination for a knee injury. Which instruction is most important for the nurse to provide the client?
- A. Take analgesics regularly to reduce the pain
- B. Notify the healthcare provider if the swelling worsens
- C. Avoid weight-bearing until the injury heals
- D. Seek treatment for the sarcoma immediately
Correct answer: D
Rationale: The correct answer is to instruct the client to seek treatment for the sarcoma immediately. Ewing's sarcoma is an aggressive cancer, and prompt treatment is crucial for improving prognosis. Option A is incorrect because while pain management is important, addressing the underlying cause (sarcoma) is the priority. Option B is not as critical as seeking treatment for the sarcoma itself. Option C is not the most important instruction as the primary concern is addressing the cancer diagnosis.
5. The healthcare provider is preparing to administer an intravenous antibiotic to a client with a central venous catheter. Which action is most important?
- A. Flush the catheter with heparin.
- B. Change the dressing at the insertion site.
- C. Check for blood return before administering the antibiotic.
- D. Use sterile technique when accessing the catheter.
Correct answer: D
Rationale: Using sterile technique when accessing the catheter is crucial to prevent infection in clients with a central venous catheter. This action helps maintain asepsis and reduces the risk of introducing pathogens into the catheter system. Flushing the catheter with heparin helps prevent occlusion but is not as crucial as ensuring sterile technique. Changing the dressing at the insertion site is important for assessing the site's condition but does not directly impact the administration of the antibiotic. Checking for blood return is essential to ensure proper catheter function, but sterile technique takes precedence to prevent infections.