Cardiac cells can withstand ischemic conditions for 20 minutes before irreversible cell injury occurs:
True
False
The Correct Answer is True
Choice A reason:
True is the correct answer. Cardiac cells can endure ischemic conditions for approximately 20 minutes before irreversible injury occurs. Beyond this period, the lack of oxygen and nutrients leads to cell death and permanent damage to the heart tissue. This understanding is crucial in acute cardiac care, where timely intervention can prevent irreversible damage.
Choice B reason:
False is incorrect because it does not align with the known tolerance period of cardiac cells to ischemic conditions. The 20-minute window is critical for initiating interventions that can save heart tissue from permanent damage.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","D","E"]
Explanation
Choice A reason: H. pylori infection is a well-known cause of duodenal ulcers. This bacterium damages the protective lining of the stomach and duodenum, leading to inflammation and ulceration. It is one of the most common causes of peptic ulcers worldwide.
Choice D reason: Nonsteroidal anti-inflammatory drugs (NSAIDs) are another primary cause of duodenal ulcers. These medications can irritate the stomach lining and increase acid production, leading to ulcer formation. Long-term use of NSAIDs is particularly associated with this risk.
E reason: Chronic alcohol (ETOH) abuse can also lead to duodenal ulcers. Alcohol irritates the stomach lining and increases acid production, which can contribute to the development of ulcers. Additionally, alcohol abuse can impair the healing process of existing ulcers.
Choice B reason: Side effects of antibiotics are not typically associated with the primary causes of duodenal ulcers. While antibiotics can cause gastrointestinal disturbances, they are not a common cause of ulcer formation.
Choice C reason: Trauma is not a primary cause of duodenal ulcers. While severe physical stress or injury can lead to stress ulcers, these are different from the typical duodenal ulcers caused by H. pylori infection, NSAIDs, or chronic alcohol abuse.
Correct Answer is A
Explanation
Choice A reason:
An embolus is the term used to describe a detached blood clot or other material that travels through the bloodstream and can cause a blockage in a blood vessel. Emboli can be composed of blood clots, fat, air, or other substances, and they can lead to serious conditions like strokes or pulmonary embolisms when they obstruct blood flow.
Choice B reason:
A thrombus is a blood clot that forms in a blood vessel and remains at its site of origin. It does not refer to a clot that has detached and is traveling through the bloodstream. The distinction between thrombus and embolus is crucial in understanding and describing vascular conditions.
Choice C reason:
Thromboembolus is a term that combines thrombus and embolus, indicating that a thrombus has become an embolus. While accurate, the more precise and commonly used term for a detached blood clot is simply "embolus."
Choice D reason:
Infarction refers to tissue death due to a lack of blood supply, often caused by an embolus or thrombus blocking a blood vessel. It does not describe the detached blood clot itself but rather the result of its action.
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