How do memory cells contribute to long-term immunity?
Memory cells directly attack pathogens in the body.
Memory cells produce antibodies upon initial pathogen exposure.
Memory cells recognize and respond rapidly to previously encountered pathogens.
Memory cells regulate the body's temperature during an infection.
The Correct Answer is C
Explanation: Memory cells recognize and respond rapidly to previously encountered pathogens. Memory cells are a type of immune cell that are formed after an initial infection or vaccination. They "remember" the specific pathogen and allow the immune system to mount a faster and stronger response upon subsequent exposures to the same pathogen, providing long-term immunity.
Incorrect choices:
a. Memory cells do not directly attack pathogens in the body. They serve as a form of immune "memory" to help the body respond more effectively to future infections.
b. Memory cells do not produce antibodies upon initial pathogen exposure. B cells are responsible for producing antibodies in response to the pathogen.
d. Memory cells do not regulate the body's temperature during an infection. Temperature regulation is mainly controlled by the hypothalamus in the brain in response to infection or other stimuli.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Explanation: Multiple sclerosis (MS) is an autoimmune disorder in which the immune system attacks the myelin sheath, the protective covering of nerve fibers in the central nervous system, leading to communication problems between the brain and the rest of the body.
Incorrect choices:
a. Rheumatoid arthritis primarily affects the joints, not the central nervous system.
b. Sjögren's syndrome primarily affects the salivary and lacrimal glands, not the central nervous system.
d. Crohn's disease is an autoimmune disorder that affects the gastrointestinal tract, not the central nervous system.
Correct Answer is A
Explanation
Explanation: Todirectly destroy pathogens and infected cells. Antibodies are Y-shaped proteins produced by B cells in response to a specific pathogen. They bind to the surface of the pathogen and mark it for destruction by other components of the immune system or directly neutralize the pathogen.
Incorrect choices:
b. While antibodies can attract white blood cells to the site of infection, their primary role is not to do so but rather to directly target and neutralize pathogens.
c. Antibodies do not produce hormones but are part of the humoral immune response, which involves the production of antibodies to fight off infections.
d. Antibodies do not play a role in maintaining body temperature during infections; instead, fever is a response triggered by the release of certain chemicals called pyrogens during infections.
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