All but one of the following occurs during the inflammatory response. Select the example below that does NOT describe the process of inflammation.
Inflammation increases capillary permeability.
Release of prostaglandins results in pain.
Chemotaxis draws leucocytes to the site of injury.
Vasoconstriction prevents excessive blood loss due to injury.
The Correct Answer is D
A. Inflammation increases capillary permeability: During inflammation, capillaries become more permeable to allow plasma proteins, leukocytes, and nutrients to enter the tissue. This is a key process that facilitates the immune response and tissue repair.
B. Release of prostaglandins results in pain: Prostaglandins are chemical mediators released during inflammation that sensitize nerve endings, causing pain. This serves as a warning signal and helps protect the injured area.
C. Chemotaxis draws leukocytes to the site of injury: Chemotaxis involves the directed migration of leukocytes toward the site of infection or injury. This ensures that immune cells reach affected tissues to fight pathogens and clear debris.
D. Vasoconstriction prevents excessive blood loss due to injury: Inflammation is characterized by vasodilation, not vasoconstriction. Vasodilation increases blood flow to the injured area, bringing immune cells and nutrients to support the healing process. Vasoconstriction is not part of the inflammatory response.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Thymus:The thymus is essential for the development and maturation of T lymphocytes, particularly in infants and young children. Removing the thymus at one year of age would severely impair adaptive immunity, leaving the child highly susceptible to infections.
B. Spleen:While the spleen plays a significant role in filtering blood and mounting immune responses, its removal is less immediately catastrophic in a one-year-old than removal of the thymus. Children can survive with partial immune support from other lymphoid tissues.
C. Appendix:The appendix contains lymphoid tissue but is not essential for immune function. Its removal has minimal long-term impact on immunity, even in young children.
D. Lymph node:Lymph nodes contribute to local immune responses, but their removal does not drastically impair systemic immunity. Other nodes can compensate for the loss of individual lymph nodes.
E. Palatine tonsil:Tonsils provide localized immune surveillance in the oropharynx. Removal may slightly reduce immune defense in that area, but systemic immunity remains largely intact.
Correct Answer is A
Explanation
A. Lymph nodes:Lymph nodes are small, encapsulated secondary lymphoid organs located along lymphatic vessels. They filter lymph, trap pathogens, and provide sites for lymphocyte activation, making them essential for immune surveillance.
B. Lymph follicles:Lymphoid follicles are dense collections of lymphocytes found within secondary lymphoid organs such as lymph nodes, tonsils, and the spleen. They are not individual organs but structural components within organs.
C. Lacteals:Lacteals are specialized lymphatic capillaries in the small intestine that absorb dietary fats. They are part of the lymphatic system but are not lymphoid organs.
D. Lymphatics:Lymphatics refer to the network of lymph vessels that transport lymph throughout the body. They are conduits rather than discrete secondary lymphoid organs.
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