Nursing Elites

1. What part of the heart is responsible for starting the electrical impulse to conduct a heart rhythm and contraction of the atria and ventricles?

• A. The Purkinje fibers in the ventricles
• B. The right & left bundle branches
• C. The atrioventricular node
• D. The sinoatrial node in the atrium

Correct answer: D

Rationale: The sinoatrial node (SA node) in the atrium is indeed responsible for initiating the electrical impulse that starts the heart's rhythm. The SA node is known as the heart's natural pacemaker. Choices A, B, and C are incorrect because while the Purkinje fibers, bundle branches, and atrioventricular node play crucial roles in the conduction of the electrical impulse throughout the heart, the SA node is specifically responsible for initiating this impulse.

2. A client with diabetes mellitus has just undergone a right, below-the-knee amputation following gangrene infection. A few days after the amputation, the client confides in the nurse that he still feels his right foot. Knowing the pathophysiologic principles behind this, the nurse can:

• A. administer a psychotropic medication to help the client cope with the sensation of his amputated leg.
• B. explain that many amputees have this sensation and that one theory surmises the end of a regenerating nerve becomes trapped in the scar tissue of the amputation site.
• C. call the physician and request an order for a psychological consult.
• D. educate the client that this area has an unusually abnormal increase in sensitivity to sensation but that it will go away with time.

Correct answer: B

Rationale: The correct answer is B. The sensation of feeling the amputated limb is known as phantom limb pain, which is common after amputation. One theory suggests that it occurs because the end of a regenerating nerve becomes trapped in the scar tissue at the amputation site. Administering psychotropic medication (choice A) is not the first-line treatment for phantom limb pain. Requesting a psychological consult (choice C) is premature without first addressing the known pathophysiological basis of phantom limb pain. Educating the client that the sensitivity will go away with time (choice D) is not entirely accurate as phantom limb pain can persist long-term.

3. A nursing student is learning about the effects of bactericidal agents. How does rifampin (Rifadin) achieve a therapeutic action against both intracellular and extracellular tuberculosis organisms?

• A. It is metabolized in the liver.
• B. It binds to acetylcholine.
• C. It inhibits synthesis of RNA.
• D. It causes phagocytosis.

Correct answer: C

Rationale: Rifampin (Rifadin) achieves a therapeutic action against both intracellular and extracellular tuberculosis organisms by inhibiting the synthesis of RNA. This action interferes with bacterial RNA synthesis, leading to the suppression of protein synthesis in the bacteria, ultimately causing their death. Option A is incorrect because rifampin is primarily metabolized in the liver, but this is not how it exerts its bactericidal effects. Option B is incorrect as rifampin does not bind to acetylcholine. Option D is also incorrect as rifampin does not cause phagocytosis.

4. A 20-year-old college student has presented to the campus medical clinic seeking to begin oral contraceptive therapy. The nurse has recognized the need for adequate health education related to the patient's request. The nurse should emphasize the fact that successful prevention of pregnancy depends primarily on the patient's

• A. current health status.
• B. vigilant adherence to the drug regimen.
• C. knowledge of sexual health.
• D. risk factors for adverse effects.

Correct answer: B

Rationale: The correct answer is B: 'vigilant adherence to the drug regimen.' When initiating oral contraceptive therapy, the success of preventing pregnancy relies heavily on the patient's commitment to following the prescribed regimen consistently. Compliance with taking the oral contraceptives as directed is crucial for their effectiveness. Choice A, 'current health status,' is not the primary factor for successful prevention of pregnancy with oral contraceptives. Choice C, 'knowledge of sexual health,' while important, is not the primary determinant of contraceptive efficacy. Choice D, 'risk factors for adverse effects,' though relevant for monitoring and managing side effects, is not the primary focus for ensuring contraceptive success.

5. What physiological reaction occurs in the body with the 'Fight or flight' response?

• A. Increased heart rate
• B. Constricted pupils
• C. Decreased blood pressure
• D. Decreased heart rate

Correct answer: A

Rationale: The 'fight or flight' response is a primal physiological reaction that prepares the body to respond to a perceived threat or danger. This response triggers an increase in heart rate to pump more blood to the muscles and vital organs, preparing the body for action. Choice B, 'Constricted pupils,' is part of the 'fight or flight' response as well, as it helps improve focus and vision. Choice C, 'Decreased blood pressure,' is incorrect because blood pressure typically increases to ensure adequate circulation during the 'fight or flight' response. Choice D, 'Decreased heart rate,' is incorrect as the heart rate increases to supply more oxygen and nutrients to the body during times of stress.

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