Name the innate defense that involves vasodilation and increased vascular permeability, resulting in the influx of blood, blood cells, and fluid to an area of injury or infection.
Inflammation
Activation of NK cells
Complement activation
Activation of mononuclear phagocytic system
The Correct Answer is A
A. Inflammation: inflammation causes vasodilation and increased capillary permeability so immune cells and plasma components reach the injured/infected tissue.
B. Activation of NK cells: NK cell activation is an innate cytotoxic response against infected or malignant cells but does not itself describe the vascular changes listed.
C. Complement activation: complement promotes opsonization, chemotaxis, and membrane attack, but the described vasodilation/permeability hallmark is inflammation.
D. Activation of mononuclear phagocytic system: activation of macrophages/monocytes contributes to defense and cleanup, but the vascular response described is specifically the inflammatory process.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"C"}
Explanation
Correct answer: Stomach
The stomach is the J-shaped digestive organ in the upper abdomen (left upper quadrant) with a thick muscular wall and gastric folds (rugae); its shape and position on the model match the circled organ.
Correct Answer is A
Explanation
A. Macrophages -Alveolar macrophages (dust cells) engulf debris, dust, and pathogens.
B. Surfactant -Surfactant reduces surface tension, preventing alveolar collapse, but does not remove particles.
C. Antibodies -Antibodies neutralize pathogens but do not actively remove inhaled particles.
D. Lymphocytes -Lymphocytes mediate immune responses but are not the main mechanism for clearing inhaled debris.
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