Nursing Elites

1. Which of the following is a characteristic of osteosarcoma?

• A. Slow-growing tumor that begins in the bone marrow
• B. Solitary tumor that most often affects the metaphyseal region of the femur or tibia
• C. An aggressive tumor most often found in the bone marrow of long bones
• D. A tumor that infiltrates the trabeculae in spongy bone and implants in surrounding tissue

Correct answer: C

Rationale: Osteosarcoma is an aggressive bone tumor that most commonly arises in the bone marrow of long bones, such as the femur or tibia. Choice A is incorrect as osteosarcoma is not a slow-growing tumor but rather a fast-growing one. Choice B is incorrect as osteosarcoma is not typically solitary but can involve multiple lesions. Choice D is incorrect as osteosarcoma primarily affects the medullary (marrow) cavity of bones, rather than infiltrating the trabeculae in spongy bone and surrounding tissue.

2. Which of the following is NOT an example of clinical manifestations of leukemia and lymphoma?

• A. Fatigue
• B. Increased risk of bleeding
• C. Increased risk of infections
• D. Increased energy and strength

Correct answer: D

Rationale: The correct answer is D: Increased energy and strength. Leukemia and lymphoma typically present with symptoms such as fatigue, weakness, increased risk of bleeding, and increased risk of infections. Patients with these conditions often experience a lack of energy and strength due to the disease's impact on the body. Therefore, increased energy and strength are not typical manifestations of leukemia and lymphoma.

3. Interpret the following arterial blood gas results: PH = 7.30; PaCO2 = 55 mmHg; HCO3 = 24 mEq/L

• A. Respiratory acidosis
• B. Metabolic acidosis
• C. Respiratory alkalosis
• D. Metabolic alkalosis

Correct answer: A

Rationale: The correct answer is A: Respiratory acidosis. In respiratory acidosis, there is an accumulation of CO2 in the blood, leading to a decrease in pH. The elevated PaCO2 of 55 mmHg in the given results indicates hypoventilation, causing respiratory acidosis. Choices B, C, and D are incorrect because the provided data does not show metabolic acidosis, respiratory alkalosis, or metabolic alkalosis.

4. A nursing student having trouble moving her head from side to side is likely experiencing a problem with which type of neurons?

• A. General visceral efferent neurons
• B. Preganglionic neurons
• C. Parasympathetic postganglionic neurons
• D. Pharyngeal efferent neurons

Correct answer: D

Rationale: The correct answer is D: Pharyngeal efferent neurons. Pharyngeal efferent neurons are responsible for controlling head movements, including side-to-side motions. General visceral efferent neurons (Choice A) are involved in innervating smooth muscles and glands in the body's internal organs. Preganglionic neurons (Choice B) are part of the autonomic nervous system and connect the central nervous system to the ganglia. Parasympathetic postganglionic neurons (Choice C) are the second neurons in the parasympathetic nervous system pathway, responsible for innervating target organs. In this case, the issue with moving the head from side to side indicates a problem with the pharyngeal efferent neurons.

5. Which of the following disorders is more likely associated with blood in stool?

• A. Gastroesophageal reflux
• B. Crohn's disease
• C. Irritable bowel syndrome
• D. Colon cancer

Correct answer: D

Rationale: Colon cancer is more likely associated with blood in stool due to the presence of bleeding from the tumor in the colon. Gastroesophageal reflux (Choice A) typically presents with heartburn and regurgitation but not blood in stool. Crohn's disease (Choice B) can cause gastrointestinal symptoms, but bloody stools are more commonly associated with ulcerative colitis. Irritable bowel syndrome (Choice C) is characterized by abdominal pain, bloating, and changes in bowel habits, but it does not typically cause blood in stool. Therefore, the correct answer is D, Colon cancer.

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