Which Of The Following Are Examples Of The Physical And Chemical Nonspecific Immune System?

What are 5 examples of nonspecific immunity?

NON SPECIFIC DEFENSES: Skin and Mucous membranes, antimicrobial chemicals, natural killer cells, phagocytosis, inflammation and fever..

What are physical and chemical barriers?

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 are physical barriers?

According to the Centers for Disease Control and Prevention (CDC), physical barriers are “structural obstacles in natural or manmade environments that prevent or block mobility (moving around in the environment) or access” for people with disabilities.

What are the physical and chemical barriers of the body and why are they important?

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.

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 body’s nonspecific defenses?

Nonspecific defenses include anatomic barriers, inhibitors, phagocytosis, fever, inflammation, and IFN. Specific defenses include antibody (more…) Although interferon was first recognized as an extraordinarily potent antiviral agent, it was found subsequently to affect other vital cell and body functions.

What is an example of a chemical barrier?

Chemical Barriers Sweat, mucus, tears, and saliva all contain enzymes that kill pathogens. Urine is too acidic for many pathogens, and semen contains zinc, which most pathogens cannot tolerate. In addition, stomach acid kills pathogens that enter the GI tract in food or water.

How does the nonspecific immune system work?

Innate, or nonspecific, immunity is the defense system with which you were born. It protects you against all antigens. Innate immunity involves barriers that keep harmful materials from entering your body. These barriers form the first line of defense in the immune response.

What are the physical barriers of the immune system?

Natural barriers and the immune system defend the body against organisms that can cause infection. (See also Lines of Defense.) Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid. Also, the normal flow of urine washes out microorganisms that enter the urinary tract.

Is skin a physical or chemical barrier?

Skin. The skin covers almost all parts of your body to prevent infection from pathogens. If it is cut or grazed it immediately begins to heal itself, often by forming a scab, which prevents infection as the skin acts as a physical barrier.

Is cilia a physical barrier?

Mucus acts as a physical barrier, trapping inhaled particles and pathogens, whilst cilia move both the mucus layer and fluid in the underlying periciliary layer.

What are three types of nonspecific immunity?

What are three types of nonspecific defenses that can prevent the entry and/or establishment of a pathogen in a person’s body? Barriers (skin), Traps (mucous membranes, cilia, hair, ear wax), and Low pH.

What is an example of specific immunity?

Examples are Addison disease, in which autoantibodies attack the adrenal cortex, and myasthenia gravis, in which they attack neuromuscular cells. In systemic diseases the immune system attacks self antigens in several organs.

What is the difference between specific and nonspecific defenses?

nonspecific immunity are things that protect the body from various bacterias, viruses, and pathogens. … Specific immunity are things that protect the body from specific pathogens. It includes the third line of defense. They include the lymphocytes (white blood cells) such as the macrophages, t cells, and memory b cells.

Which line of defense is most important?

The third line of defense is most important because it involves the cells and proteins of adaptive immunity, responding directly to specific antigens. All three lines of defense depend on each other to function properly and no single line is more important than the other.