HESI RN
Biology Practice Test
1. Which of the following makes it possible to predict the genotype and phenotype of the offspring of sexual reproduction?
- A. Punnett square
- B. Chi-square
- C. Microscope
- D. None of these
Correct answer: A
Rationale: The correct answer is A, Punnett square. A Punnett square is a tool specifically designed to predict the genotype and phenotype combinations of offspring resulting from a particular cross or breeding experiment. It helps in understanding the probability of different genotypes and phenotypes appearing in the offspring. Choice B, Chi-square, is a statistical test used to determine if there is a significant difference between the expected frequencies and the observed frequencies in a study. Choice C, Microscope, is used for viewing tiny structures and organisms, not for predicting genetic outcomes. Choice D, None of these, is incorrect as Punnett square is a valid tool for predicting genetic outcomes in offspring.
2. A public health nurse is planning a vaccination clinic for a rural community. Which vaccine should the nurse prioritize for adults in this area?
- A. hepatitis A
- B. influenza
- C. varicella
- D. measles, mumps, rubella (MMR)
Correct answer: B
Rationale: The correct answer is 'B: influenza.' Influenza vaccination is crucial for adults, particularly in rural areas where access to healthcare may be limited. Influenza can cause serious illness and complications, and vaccination helps protect individuals and prevent the spread of the virus. While vaccines for hepatitis A, varicella, and measles, mumps, rubella (MMR) are important, prioritizing influenza vaccination in this scenario is essential due to its seasonal prevalence and potential impact on public health. Hepatitis A and varicella vaccines are also important but may not be as immediately critical for this population. MMR vaccine is typically administered in childhood, so it is not the priority for adults in this scenario.
3. A public health nurse is planning a campaign to increase immunization rates among children in a low-income community. Which intervention should the nurse prioritize?
- A. Provide free immunizations at local schools
- B. Create educational materials about vaccine safety
- C. Organize a community forum to discuss immunization concerns
- D. Partner with local media to promote the importance of vaccines
Correct answer: A
Rationale: The correct answer is A: Provide free immunizations at local schools. This intervention directly addresses financial barriers and increases accessibility for families in low-income communities. By offering free immunizations at local schools, the nurse can ensure that more children receive the necessary vaccines without worrying about the cost. Choice B, creating educational materials, may be helpful but may not directly address the financial barriers that low-income families face. Choice C, organizing a community forum, can be beneficial for addressing concerns but may not result in immediate action to increase immunization rates. Choice D, partnering with local media, can help raise awareness but may not directly provide the solution of making immunizations more accessible by removing financial barriers.
4. A 36-week primigravida is admitted to labor and delivery with severe abdominal pain and bright red vaginal bleeding. Her abdomen is rigid and tender to touch. The fetal heart rate (FHR) is 90 beats/minute, and the maternal heart rate is 120 beats/minute. What action should the nurse implement first?
- A. Alert the neonatal team and prepare for neonatal resuscitation
- B. Notify the healthcare provider from the client’s bedside
- C. Obtain written consent for an emergency cesarean section
- D. Draw a blood sample for stat hemoglobin and hematocrit
Correct answer: B
Rationale: In this scenario, the priority action for the nurse is to notify the healthcare provider from the client's bedside. The clinical presentation of severe abdominal pain, bright red vaginal bleeding, rigid and tender abdomen, along with fetal bradycardia (FHR 90 bpm) and maternal tachycardia (120 bpm) indicates an urgent need for medical intervention. Notifying the healthcare provider promptly allows for immediate assessment and decision-making to address the critical condition and ensure timely and appropriate management for both the mother and fetus.
5. A multiparous client is involuntarily pushing while being wheeled into the labor triage area. The nurse observes the fetal head presenting at the perineum. Which action should the nurse take?
- A. Support the infant as it emerges.
- B. Review prenatal laboratory results.
- C. Obtain fetal heart tones.
- D. Apply suprapubic pressure.
Correct answer: A
Rationale: When the fetal head is visible at the perineum, the priority is to support the infant's birth to prevent injury. Providing support as the infant emerges helps ensure a safe delivery process and reduces the risk of complications associated with rapid or uncontrolled birth.