not realizing that its surface was hot a woman has quickly withdrawn her hand from the surface of a bowl that she was removing from a microwave which
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Nursing Elites

ATI RN

ATI Pathophysiology Exam

1. Not realizing that its surface was hot, a woman has quickly withdrawn her hand from the surface of a bowl that she was removing from a microwave. Which phenomena has facilitated the rapid movement of her hand in response to the painful stimulus?

Correct answer: C

Rationale: The withdrawal reflex is a protective response that allows a person to quickly remove their hand from a painful stimulus.

2. The unique clinical presentation of a 3-month-old infant in the emergency department leads the care team to suspect botulism. Which assessment question posed to the parents is likely to be most useful in the differential diagnosis?

Correct answer: A

Rationale: The correct answer is A. Botulism in infants is often linked to honey consumption. Asking the parents if they have ever given their child any honey or honey-containing products can provide crucial information for the differential diagnosis. This is important because infant botulism is commonly associated with the ingestion of honey contaminated with Clostridium botulinum spores. Choices B, C, and D are less relevant to botulism in infants as they do not directly relate to the typical causes of the condition. Family history of neuromuscular diseases (choice B) may be important for other conditions but not specifically for infant botulism. Direct exposure to chemical cleaning products (choice C) and the presence of mold in the home (choice D) are not typical risk factors for infant botulism.

3. A 70-year-old client presents with weakness and sensory loss in the right hand and foot. The client also exhibits speech difficulties. Which condition is the client most likely experiencing?

Correct answer: C

Rationale: The correct answer is C: Cerebral infarction (stroke). In this case, the client's symptoms of weakness and sensory loss in the right hand and foot, along with speech difficulties, are indicative of a stroke. These symptoms are commonly seen in individuals experiencing a cerebral infarction, where a blockage in blood flow to the brain leads to neurological deficits. Choices A, B, and D are less likely as transient ischemic attacks (TIAs) typically have temporary symptoms with no permanent damage, brain tumors may present with a different set of symptoms depending on their location, and multiple sclerosis usually presents with a relapsing-remitting pattern of neurological symptoms rather than sudden onset unilateral deficits.

4. Which of the following is the most appropriate diagnostic method for identifying lung cancer in its early stages?

Correct answer: D

Rationale: A biopsy is the most appropriate method for diagnosing lung cancer in its early stages. A biopsy involves taking a small tissue sample from the lung for examination under a microscope. This method provides a definitive diagnosis by identifying cancerous cells. CT scans, MRIs, and X-rays can help detect abnormalities in the lungs, but a biopsy is necessary to confirm the presence of lung cancer. CT scans offer detailed images of the lung's structure, MRIs use magnetic fields for imaging soft tissues, and X-rays provide a basic view of the lungs, but none of these imaging techniques can definitively confirm the presence of cancer without a biopsy.

5. The nurse is caring for a client with an astrocytoma. The client asks, 'What do astrocytes do in the brain?' What is the nurse's best response?

Correct answer: A

Rationale: Astrocytes play a crucial role in supporting and nourishing neurons by providing metabolic support, maintaining the blood-brain barrier, and regulating the chemical environment of the brain. While astrocytes are essential for brain function, they are not neurons and do not transmit electrical signals (Choice B). Astrocytes are not primarily involved in immune responses in the brain (Choice C) or in regulating blood flow in the brain (Choice D), although they indirectly influence blood flow through their support functions.

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