Nursing Elites

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

• A. Pacemaker of the heart
• B. Blood pressure regulation
• C. Electrical conduction delay
• D. Stimulating muscle contraction

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. What is the most common sign of a localized infection?

• A. Fever
• B. Elevated white blood cell count
• C. Redness, warmth, and swelling at the site of infection
• D. Chills and shivering

Correct answer: C

Rationale: The correct answer is C: Redness, warmth, and swelling at the site of infection. These signs are typical indications of a localized infection, representing inflammation and the body's immune response to the pathogen. Fever (choice A) is a systemic response and not specific to a localized infection. Elevated white blood cell count (choice B) can be seen in both localized and systemic infections. Chills and shivering (choice D) are more related to the body's response to fever and not specifically indicative of a localized infection.

3. What is the most common cause of hyperthyroidism?

• A. Graves' disease
• B. Hashimoto's thyroiditis
• C. Thyroid nodules
• D. Pituitary adenoma

Correct answer: A

Rationale: Corrected Rationale: Graves' disease is the most common cause of hyperthyroidism. It is characterized by an overactive thyroid gland due to autoantibodies stimulating the thyroid. Hashimoto's thyroiditis is actually a cause of hypothyroidism, not hyperthyroidism. Thyroid nodules and pituitary adenoma are not common causes of hyperthyroidism.

4. Which of the following is a common side effect of opioid analgesics that the nurse should monitor for in patients?

• A. Diarrhea
• B. Hypertension
• C. Constipation
• D. Bradycardia

Correct answer: C

Rationale: Constipation is a common side effect of opioid analgesics due to the slowing of gastrointestinal motility. Opioids bind to receptors in the gastrointestinal tract, leading to decreased peristalsis and increased water absorption, resulting in constipation. Monitoring for constipation is crucial to prevent discomfort or complications like bowel obstruction. Diarrhea (Choice A) is not a common side effect of opioid analgesics. Hypertension (Choice B) and Bradycardia (Choice D) are not typically associated with opioid use.

5. Which cranial nerve is responsible for the sense of smell?

• A. Olfactory nerve
• B. Optic nerve
• C. Trigeminal nerve
• D. Vagus nerve

Correct answer: A

Rationale: The olfactory nerve (Cranial Nerve I) is indeed responsible for the sense of smell. It is located in the nasal cavity and transmits olfactory information to the brain. The optic nerve (Choice B) is responsible for vision, the trigeminal nerve (Choice C) is responsible for sensation in the face, and the vagus nerve (Choice D) is responsible for various functions such as heart rate, digestion, and speech. Therefore, the correct answer is the olfactory nerve (Choice A).

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