what is the primary role of the sinoatrial sa node in the heart
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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. The UAP reports to the PN that a client refused to bathe for the third consecutive day. Which action is best for the PN to take?

Correct answer: D

Rationale: The best action for the PN to take when a client refuses to bathe is to ask the client why the bath was refused. Understanding the client's reasons for refusing a bath is crucial as it helps to address any underlying issues, such as fear, discomfort, or physical limitations. By communicating directly with the client, the PN can provide appropriate care tailored to the client's needs. Choices A, B, and C do not directly address the root cause of the refusal and may not effectively resolve the issue.

3. A client is post-operative day two from a total hip arthroplasty. The nurse notices the surgical wound is red and warm to the touch. What is the most appropriate action?

Correct answer: D

Rationale: The correct action when a nurse notices redness and warmth at the surgical wound post total hip arthroplasty is to notify the healthcare provider. These signs may indicate an infection, and prompt evaluation by the healthcare provider is crucial to initiate appropriate treatment. Applying an ice pack (Choice A) may not address the underlying issue of a potential infection. Monitoring the client's temperature (Choice B) is important but not the priority when signs of infection are present. Documenting the findings and continuing to monitor (Choice C) is necessary but should be accompanied by notifying the healthcare provider for further assessment and intervention.

4. After administering pantoprazole to a client with gastroesophageal reflux disease (GERD), which statement by the client indicates to the nurse that the medication is producing the desired effect?

Correct answer: A

Rationale: The correct answer is A. Pantoprazole reduces stomach acid production, thus preventing the occurrence of heartburn after meals, which is a common symptom of GERD. Choice B is incorrect because an increased appetite and hunger are not indicators of the desired effect of pantoprazole. Choice C is unrelated to the medication's effect on GERD symptoms. Choice D is also incorrect because the absence of difficulty swallowing is not a specific indicator of pantoprazole's effectiveness in treating GERD.

5. All of the following are posture and body alignment problems EXCEPT:

Correct answer: C

Rationale: Thrombosis is a condition involving blood clots and is not related to posture or body alignment, unlike kyphosis, scoliosis, and lumbar lordosis, which are spinal alignment issues. Kyphosis refers to excessive outward curvature of the spine, scoliosis is characterized by a sideways curvature of the spine, and lumbar lordosis involves an exaggerated inward curve in the lower back. Thrombosis, on the other hand, is a condition where blood clots form in the blood vessels, not a posture or body alignment problem.

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