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Questions and Answers
Which of the following is NOT a type of invader the body must defend against?
Which of the following is NOT a type of invader the body must defend against?
- Bacteria
- Cancer cells
- Hormones (correct)
- Viruses
What is the primary difference between non-specific and specific defense mechanisms?
What is the primary difference between non-specific and specific defense mechanisms?
- Specific defenses require prior exposure to an invader.
- Non-specific defenses target a wide range of invaders, while specific defenses target specific invaders. (correct)
- Specific defenses are faster to activate.
- Non-specific defenses are more effective.
Which of the following is an example of a non-specific defense mechanism?
Which of the following is an example of a non-specific defense mechanism?
- Production of antibodies
- Humoral immunity
- Cell-mediated immunity
- Inflammation (correct)
What is the purpose of immunological memory?
What is the purpose of immunological memory?
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What is an antigen?
What is an antigen?
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Study Notes
Defense Mechanisms of the Body
- Individuals face constant threats from harmful invaders throughout life, starting from prenatal development.
- Types of invaders include:
- Bacteria
- Viruses
- Cancer cells
- Parasites
- Foreign (non-self) cells, such as those in tissue transplants.
Categories of Protective Measures
- Protective measures are classified into two key categories:
- Non-specific defense mechanisms:
- Offer broad protection against a wide variety of potential dangers.
- Specific defense mechanisms (Immunity):
- Targeted resistance against particular invaders.
- Develop immunological memory, which provides long-term immunity against specific infections.
- Non-specific defense mechanisms:
Role of Antigens
- An antigen is defined as any substance that triggers an immune response, prompting the body to produce specific defenses.
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