What Are The Specific Defenses In The Immune System?

What is the function of the immune system’s specific defenses?

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 is an example of nonspecific immune system defenses?

Nonspecific defenses include anatomic barriers, inhibitors, phagocytosis, fever, inflammation, and IFN. Specific defenses include antibody (more…)

What are the specific host defenses of the body?

Host Defense Mechanisms Against InfectionNatural barriers (eg, skin, mucous membranes)Nonspecific immune responses (eg, phagocytic cells [neutrophils, macrophages] and their products)Specific immune responses (eg, antibodies, lymphocytes)

What are natural killer cells?

Natural Killer (NK) Cells are lymphocytes in the same family as T and B cells, coming from a common progenitor. … They are named for this ‘natural’ killing. Additionally, NK cells secrete cytokines such as IFNγ and TNFα, which act on other immune cells like Macrophage and Dendritic cells to enhance the immune response.

Is mucus a chemical barrier?

The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, ‘friendly’ bacteria and white blood cells called neutrophils.

What is the body’s second line of defense?

The second line of defense is nonspecific resistance that destroys invaders in a generalized way without targeting specific individuals: Phagocytic cells ingest and destroy all microbes that pass into body tissues. For example macrophages are cells derived from monocytes (a type of white blood cell).

What is an example of a specific immune response?

Specific immunity, also known as adaptive immunity, is specialized immunity for particular pathogens. Helper T-cells, cytotoxic T-cells, and B-cells are involved in specific immunity. The non-specific cells, like macrophages, tell the T- and B-cells that an intruder is present.

What is meant by non specific defenses?

Nonspecific defense: the innate immune system The human body has a series of nonspecific defenses that make up the innate immune system. These defenses are not directed against any one pathogen but instead, provide a guard against all infection.

What is the 1st 2nd and 3rd line of defense?

The first line of defense are the physical and chemical barriers, which are considered functions of innate immunity. … The third line of defense is specific resistance, which is considered a function of acquired immunity.

What are the two main arms of the immune system?

In vertebrates, the immune system consists of two arms, a non-specific, innate arm and a more specific, acquired arm (Male and Roitt, 2000; Doan et al., 2005). The innate immune system provides initial protection to a wide variety of foreign organisms.

What are the four categories of nonspecific defenses found in the body?

List the four major categories of nonspecific immunity.Inflammation.Phagocytosis.Interferon.Complement proteins.

What are the 3 lines of defense in the immune system?

The immune system’s three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.

How does the specific immune system work?

The adaptive (specific) immune system makes antibodies and uses them to specifically fight certain germs that the body has previously come into contact with. This is also known as an “acquired” (learned) or specific immune response.

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).

Which of the following cells are involved in specific defenses?

CardsTerm A patient who had to have his spleen removed asks you if the spleen removal will cause a problem. Your best response would beDefinition “The doctor is the best person to answer that.”Term Which of these are the major WBCs involved in specific defenses?Definition macrophages and lymphocytes44 more rows•May 14, 2013

What is non specific immune system?

A non-specific immune cell is an immune cell (such as a macrophage, neutrophil, or dendritic cell) that responds to many antigens, not just one antigen. … The cells of the innate immune system do not have specific responses and respond to each foreign invader using the same mechanism.

What are the general features of the immune system?

They include neutrophils, eosinophils, basophils, mast cells, monocytes, dendritic cells, and macrophages (See Immune Cells for detailed descriptions). Their main feature is the ability to respond quickly and broadly when a problem arises, typically leading to inflammation.

What is the difference between the nonspecific defenses and specific defenses of the immune system?

nonspecific immunity are things that protect the body from various bacterias, viruses, and pathogens. These include the first and second line of defense, such as the skin, fever( body gets hot as an attempt to kill the pathogen). Specific immunity are things that protect the body from specific pathogens.

What are the two types of specific immunity?

LEVELS OF IMMUNE SYSTEM The human specific immune system is a two level or DUAL SYSTEM consisting of soluble antibodies and special immune cells. The two systems work intimately as a coordinated unit.

What are examples of specific defenses?

Specific Defense (The Immune System)Recognition. The antigen or cell is recognized as nonself. … Lymphocyte selection. The primary defending cells of the immune system are certain white blood cells called lymphocytes. … Lymphocyte activation. … Destruction of the foreign substance.

What cells are responsible for specific immunity?

Targeted responders: cells known as lymphocytes, which target invaders by producing proteins called antibodies that target specific antigens. This process is a targeted or specific immune response. Each antigen that enters your body has an antibody targeted to it.