What manifestation of acute inflammation is caused by vasodilation?
Redness
Loss of function
Pain
Swelling
The Correct Answer is A
Choice A reason: Vasodilation in acute inflammation, triggered by mediators like histamine, increases blood flow to the affected area, delivering more oxygenated blood. This causes erythema (redness), a hallmark of inflammation, as hemoglobin concentration rises in tissues, making this the correct choice.
Choice B reason: Loss of function in inflammation results from tissue damage or swelling impairing normal activity, not directly from vasodilation. Vasodilation contributes to redness and warmth, not functional loss, making this choice incorrect for vasodilation’s effect.
Choice C reason: Pain in inflammation is caused by mediators like bradykinin and prostaglandins sensitizing nociceptors, not directly by vasodilation. While vasodilation supports inflammation, it does not directly cause pain, making this choice incorrect for the manifestation.
Choice D reason: Swelling (edema) in inflammation results from increased capillary permeability, allowing fluid leakage into tissues. Vasodilation increases blood flow but does not directly cause fluid extravasation, making this choice incorrect for vasodilation’s specific effect.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Acidosis does not enhance gastrointestinal potassium absorption. Hyperkalemia in acidosis results from cellular shifts, not increased absorption, as hydrogen ions affect potassium movement, making this choice incorrect.
Choice B reason: Acidosis does not increase renal potassium excretion; it causes hyperkalemia by shifting potassium out of cells. Hypokalemia may occur in alkalosis, not acidosis, making this choice incorrect.
Choice C reason: Acidosis causes hyperkalemia as excess hydrogen ions enter cells to buffer pH, displacing potassium into the bloodstream. This cellular shift elevates serum potassium, making this the correct choice.
Choice D reason: Acidosis promotes potassium release from cells, not uptake, causing hyperkalemia. Hypokalemia occurs in alkalosis, where potassium enters cells, making this choice incorrect for acidosis effects.
Correct Answer is ["A","C","E"]
Explanation
Choice A reason: Stabilizing the wrist with an elastic wrap supports the injured ligaments, reducing movement and further damage. It promotes healing by maintaining alignment, making this a correct action for acute wrist sprain management.
Choice B reason: Applying a warm pack increases blood flow, which may worsen swelling in an acute sprain. Cold therapy is recommended to reduce inflammation and pain, making this choice incorrect for acute sprain management.
Choice C reason: Elevating the wrist above the heart reduces swelling by decreasing hydrostatic pressure, allowing fluid to drain from the injury site. This minimizes edema, making this a correct action for acute wrist sprain.
Choice D reason: Frequent massage may aggravate an acute sprain by increasing inflammation and pain. Rest and immobilization are preferred to promote healing, making this choice incorrect for acute wrist sprain management.
Choice E reason: Resting the wrist prevents further injury to damaged ligaments, allowing healing and reducing inflammation. Avoiding strain is critical in acute sprains, making this a correct action for wrist sprain recovery.
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