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What are four characteristics of the specific immune system?
There are four characteristics of adaptive immunity: antigenic specificity, diversity, immunologic memory and ability to distinguish between self and non-self. An immune response involves Lymphocytes (B-cells and T-cells) and antigen presenting cells (macrophages, B-cells, and dendritic cells).
Why is the specific immune response described as specific?
Specific immune responses are triggered by antigens. Antigens are usually found on the surface of pathogens and are unique to that particular pathogen. The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies.
What are three important characteristics of the adaptive immune response?
Adaptive immunity is defined by three important characteristics: specificity and memory. Specificity refers to the adaptive immune system’s ability to target specific pathogens, and memory refers to its ability to quickly respond to pathogens, also known as specific resistance, to which it has previously been exposed.
What are 4 general properties of specific defenses?
specificity, versatility, memory, and tolerance. direct attack by T cells and circulating antibodies.
What are key characteristics of specific defenses?
The specific defense system has 3 characteristics: antigen specific– it recognizes and acts against specific pathogens or foreign substances. systemic- it is not restricted to the initial infection site. has memory- it recognizes and mounts even stronger attacks on previously encountered pathogens.
What are examples of specific defenses?
There are two types of specific defense. These include cell-mediated immunity and antibody-mediated immunity. Cell-mediated immunity occurs when T-lymphocytes (T-cells) become activated by exposure to pathogens. Activated T-cells then attack pathogens directly.
What are the specific defenses in the immune system?
The innate immune system provides this kind of nonspecific protection through a number of defense mechanisms, which include physical barriers such as the skin, chemical barriers such as antimicrobial proteins that harm or destroy invaders, and cells that attack foreign cells and body cells harbouring infectious agents.
How do specific defenses work?
The specific defenses work by recognizing the specific antigen of a microorganism and mounting a response that targets the microorganism for destruction by components of the non-specific system.
What are the 4 phases of the immune response?
|Term What are the four stages of the immune response?||Definition 1. Lag phase 2. Exponential phase 3. Steady state phase 4. Decline phase|
|Term What cells allow T cells to form into effector T cells and B cells to form into plasma cells?||Definition Helper T cells|
Jan 30, 2012
What is the first immune response?
Innate immunity is the first immunological, non-specific mechanism for fighting against infections. This immune response is rapid, occurring minutes or hours after aggression and is mediated by numerous cells including phagocytes, mast cells, basophils and eosinophils, as well as the complement system.
What are the three phases of immune response?
The cellular immune response consists of three phases: cognitive, activation, and effector.
What is the 1st 2nd and 3rd line of defense?
In the Three Lines of Defense model, management control is the first line of defense in risk management, the various risk control and compliance over- sight functions established by management are the second line of defense, and independent assurance is the third.
What are the 3 lines of immune defense?
The Immune System has 3 Lines of Defense Against Foreign Pathogens:
- Physical and Chemical Barriers (Innate Immunity)
- Nonspecific Resistance (Innate Immunity)
- Specific Resistance (Acquired Immunity)
What are the primary and secondary immune response?
Primary Immune Response is the reaction of the immune system when it contacts an antigen for the first time. Secondary Immune Response is the reaction of the immune system when it contacts an antigen for the second and subsequent times.
Is the primary immune response specific?
Upon initial exposure to an antigen, a primary response occurs. After a latent period, usually lasting several days, specific antibodies begin to appear in the blood. The next and subsequent times you encounter this antigen, your body produces a secondary immune response.
What are the two types of immune response?
Although all components of the immune system interact with each other, it is typical to consider two broad categories of immune responses: the innate immune system and the adaptive immune system. Innate immune responses are those that rely on cells that require no additional “training” to do their jobs.
What happens in primary immune response?
A primary immune response leads to release of polyreactive IgM by B1 B cells in a T-cell–independent way and provides a first line of defense. This immune reaction usually does not induce immune memory.