HESI RN
Biology Practice Test
1. The Punnett square shows that one parent carries the recessive gene for a cleft chin (c) while the other parent does not. What percentage of the parents' offspring is predicted to have a cleft chin?
- A. 25%
- B. 50%
- C. 0%
- D. 75%
Correct answer: C
Rationale: The correct answer is 0%. If one parent carries the recessive gene for a cleft chin while the other parent does not, none of the offspring will express the recessive phenotype. This is because in order for a child to have a cleft chin, they would need to inherit the recessive gene from both parents. Therefore, although the offspring could be carriers of the gene, none are predicted to have a cleft chin. Choices A, B, and D are incorrect because the presence of the recessive gene in one parent and its absence in the other would not result in any offspring showing the cleft chin trait.
2. Which of the following best describes the nurse's responsibility in obtaining informed consent?
- A. The nurse is responsible for ensuring that the patient understands the procedure and has the opportunity to ask questions.
- B. The nurse should ensure that the patient signs the consent form before the procedure begins.
- C. The nurse is responsible for witnessing the patient sign the consent form and documenting the event.
- D. The nurse should delegate the task of obtaining informed consent to another healthcare provider.
Correct answer: A
Rationale: The correct answer is A. Informed consent is a process where the healthcare provider, in this case, the nurse, ensures that the patient understands the procedure, risks, benefits, and alternatives before they agree to it. The nurse plays a crucial role in facilitating this understanding by explaining the information in a clear and understandable manner and providing the patient with the opportunity to ask questions. Choice B is incorrect because merely obtaining the patient's signature on the consent form does not ensure that the patient truly understands what they are consenting to. Choice C is not fully accurate as the nurse's role goes beyond just witnessing the signature; it involves actively ensuring the patient's comprehension. Choice D is incorrect as the responsibility of obtaining informed consent should not be delegated to another healthcare provider, as it is the nurse's duty to ensure proper communication and understanding with the patient.
3. A client with a history of closed head injury has a radial artery catheter in place and complains of numbness and pain distal to the insertion site. What action should the nurse take?
- A. Monitor the site for further complications.
- B. Promptly remove the catheter from the radial artery.
- C. Elevate the client’s arm above the heart.
- D. Notify the healthcare provider and prepare for surgery.
Correct answer: B
Rationale: A weak pulse and numbness distal to a radial artery catheter may indicate occlusion or damage to the artery, and immediate removal of the catheter is necessary to prevent complications. Therefore, promptly removing the catheter from the radial artery (Choice B) is the correct action. Monitoring the site (Choice A) would delay necessary intervention, elevating the client's arm (Choice C) may not address the underlying issue, and notifying the healthcare provider for surgery (Choice D) without removing the catheter promptly could lead to further complications.
4. A pregnant client receives Rho(D) immune globulin after an amniocentesis. The day following, she reports a temperature of 99.8°F (37.67°C). Which action should the nurse implement?
- A. Schedule a visit with the healthcare provider today.
- B. Verify the compatibility of the administered Rho(D) immune globulin.
- C. Encourage the client to increase her intake of oral fluids.
- D. Instruct the client to maintain bedrest for 24 hours.
Correct answer: C
Rationale: A mild increase in temperature post-amniocentesis is common, and encouraging the client to increase oral fluid intake is the appropriate action. Increasing fluid intake can help reduce mild fever, promote recovery, and prevent dehydration. It is important for the nurse to educate the client on the importance of staying hydrated to support her overall well-being during this time.
5. A client has altered renal function and is being treated at home. The nurse recognizes that the most accurate indicator of fluid balance during the weekly visits is:
- A. difference in the intake and output
- B. changes in the mucous membranes
- C. skin turgor
- D. weekly weight
Correct answer: D
Rationale: In a client with altered renal function, monitoring fluid balance is crucial. Weekly weight is the most accurate indicator of fluid balance during the visits as it reflects cumulative changes in the body's fluid status. Changes in intake and output (Choice A) can provide valuable information, but weekly weight is a more direct measure of overall fluid retention or loss. Changes in mucous membranes (Choice B) and skin turgor (Choice C) can be influenced by factors other than fluid balance, making them less reliable indicators in this context.