what is the primary role of the sinoatrial sa node in the heart
Logo

Nursing Elites

HESI LPN

HESI PN Exit Exam

1. What is the primary role of the sinoatrial (SA) node in the heart?

Correct answer: A

Rationale: The correct answer is A: Pacemaker of the heart. The SA node, known as the natural pacemaker, initiates the electrical impulses that set the rhythm for the heartbeat. It is responsible for coordinating the heart's contractions by generating electrical signals at regular intervals. Choice B is incorrect as the SA node's primary function is not related to blood pressure regulation. Choice C is incorrect as the SA node does not cause electrical conduction delay but rather initiates and conducts the electrical impulses. Choice D is incorrect as the SA node does not directly stimulate muscle contraction but rather initiates the electrical events that lead to muscle contraction.

2. How does the home care nurse determine that a 78-year-old client is unable to remain in his current residence alone?

Correct answer: C

Rationale: The correct answer is assessing the home environment. This process is vital in evaluating whether an elderly client can safely live independently. Factors like safety hazards and the client's ability to handle daily activities are considered during this assessment. Choices A, B, and D are incorrect because determining the client's ability to remain in his residence alone relies more on evaluating the home environment for safety and suitability rather than the client's goals, learning level, or distractions in the home.

3. Which of the following is NOT a second-line agent used for the treatment of Tuberculosis?

Correct answer: C

Rationale: The correct answer is C, Rifabutin. Rifabutin is actually a first-line drug used in the treatment of tuberculosis. Choices A, B, and D (Amikacin, Moxifloxacin, and Cycloserine) are considered second-line agents for tuberculosis treatment. These drugs are used when the first-line medications are either ineffective or cannot be tolerated by the patient.

4. A new mother who is breastfeeding her newborn for the first time after delivery reports nipple pain when the baby sucks. Based on this client problem, which action should the PN take?

Correct answer: A

Rationale: Proper latch, including all the areolar tissue in the infant's mouth, is essential to prevent nipple pain and ensure effective breastfeeding. Option A is correct because ensuring that all the areolar tissue of the nipple is in the infant's mouth helps achieve a good latch, reducing nipple pain. Option B is incorrect as repositioning the infant may not address the root cause of the pain related to latch issues. Option C is incorrect because while checking for engorgement and nipple issues is important, it does not directly address the latch concern causing the pain. Option D is incorrect as applying a warm compress is not recommended for breastfeeding mothers; a warm compress can help with pain associated with engorgement, but it does not address latch issues.

5. What is the best thing to say to a patient scheduled for cataract surgery who is concerned that the physician works on the correct eye?

Correct answer: D

Rationale: The best response reassures the patient by explaining the process of verifying and marking the correct eye, a safety measure to prevent wrong-site surgery, directly addressing the patient’s concern. Choice A is close but implies the ID bracelet alone determines the correct eye, missing the verification process. Choice B talks about confirmation but lacks details about marking the correct eye. Choice C mentions the surgeon's record but does not specify the direct verification and marking process, unlike Choice D.

Similar Questions

What is the function of the epiglottis during swallowing?
After adding feeding solution to a client's tube feeding system as seen in the picture, what action should the PN take next?
A male client attends a community support program for mentally impaired and chemically abusing clients. The client tells the PN that his drugs of choice are cocaine and heroin. What is the greatest health risk for this client?
The nurse is assisting the recreational director of a long-term care facility in planning outdoor activities for the wheelchair-bound older residents who are mentally alert. Which activity meets the physical and social needs of these residents?
A client with a prescription for a transcutaneous electrical nerve stimulator (TENS) unit for pain management asks how it works. What information should the nurse reinforce?

Access More Features

HESI LPN Basic
$69.99/ 30 days

  • 5,000 Questions with answers
  • All HESI courses Coverage
  • 30 days access

HESI LPN Premium
$149.99/ 90 days

  • 5,000 Questions with answers
  • All HESI courses Coverage
  • 30 days access

Other Courses