Which of the following is the primary purpose of the immune response?
To directly attack and kill infected cells.
To produce antigens for recognition by the body.
To regulate the body's metabolism.
To protect the body against pathogens and foreign substances.
The Correct Answer is D
Explanation: The immune response is a complex system of defense mechanisms that aim to protect the body from pathogens, such as bacteria, viruses, and other foreign substances. It involves the activation of various immune cells, production of antibodies, and other immune components to recognize and eliminate the invading pathogens.
Incorrect choices:
a. Directly attacking and killing infected cells is the role of cytotoxic T cells during cell-mediated immunity, but it is not the primary purpose of the overall immune response.
b. Antigens are foreign substances that trigger the immune response. They are not produced by the immune response itself but rather recognized by immune cells and antibodies.
c. The immune response is not involved in regulating the body's metabolism. Metabolism regulation is primarily controlled by other systems in the body, such as the endocrine system.
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Related Questions
Correct Answer is D
Explanation
xplanation: Memory B cells are formed during the primary immune response and play a critical role in the secondary immune response. When re-exposed to the same antigen, memory B cells quickly differentiate into plasma cells that produce large quantities of specific antibodies, leading to a rapid and robust immune response.
Incorrect choices:
a. The production of antibodies during the primary immune response is primarily carried out by plasma cells, not memory B cells.
b. The activation of helper T cells is essential for coordinating the immune response, but memory B cells are not directly responsible for this process.
c. The initiation of the complement cascade is a separate component of the immune response involving complement proteins, and memory B cells are not directly involved in this process.
Correct Answer is B
Explanation
Explanation: Fibromyalgia is a chronic pain disorder characterized by widespread pain, fatigue, and tender points in specific areas of the body, such as the neck, shoulders, back, and hips.
Incorrect choices:
a. Systemic lupus erythematosus (SLE) is an autoimmune disorder that can affect multiple organs and systems, including the skin, joints, kidneys, and nervous system.
c. Multiple sclerosis (MS) is an autoimmune disorder that affects the central nervous system, causing symptoms such as fatigue, muscle weakness, and coordination problems.
d. Sjögren's syndrome is an autoimmune disorder that primarily affects the salivary and lacrimal glands, leading to dry eyes and dry mouth.
True or False: Immune disorders can be caused by both genetic and environmental factors.
Explanation: Immune disorders can result from a combination of genetic predisposition and environmental triggers. Some individuals may have a genetic susceptibility to developing certain immune disorders, and exposure to certain environmental factors, such as infections or certain substances, can trigger the immune response leading to the development of the disorder.
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