What Is The Body’S First Line Of Defense Against Bacteria And Viruses Quizlet?

What is the body’s first line of defense against bacteria and viruses?

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 against viruses?

If pathogens are able to get past the first line of defence, for example, through a cut in your skin, an infection develops. The second line of defence is a group of cells, tissues and organs that work together to protect the body. This is the immune system.

Is fever a first line of defense?

The body’s first line of defense against pathogens includes physical, chemical, and biological barriers. … If pathogens do manage to enter the body, the body’s second line of defense attacks them. The second line of defense includes inflammation, phagocytosis, and fever.

What are the three lines of defense in the immune system quizlet?

Terms in this set (10)1st line of defense. mucus, skin, tears, earwax, saliva, washing hands.2nd line of defense. phagocytes, inflammation, soreness, redness.3rd line of defense. the immune system.phagocytes. … antibodies. … triggers 2nd line of defense. … triggers 3rd line of defense. … antibiotics.More items…

What is the first line of defense quizlet?

What is the first line of defense? Made up of structures, chemicals, and processes that work to prevent pathogens entering the body. Includes the skin and mucous membranes of the respiratory, digestive, urinary, and reproductive systems.

What skill is the first line of defense?

The first line of defence is management control, which involves front-line employees; the second line comprises risk and compliance professionals; and the third is composed of internal audit departments and, often, the board.

What are the 3 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 four stages of the immune system?

This can be broken down into four stages: the lag, exponential, steady state, and declining phases. This is the time from initial antigen exposure to when antibodies are detected in the blood, and takes about a week. In this time, specialized B and T cells are activated by contact with the antigen.

How does the immune system respond to a virus?

A virus-bound antibody binds to receptors, called Fc receptors, on the surface of phagocytic cells and triggers a mechanism known as phagocytosis, by which the cell engulfs and destroys the virus. Finally, antibodies can also activate the complement system, which opsonises and promotes phagocytosis of viruses.

What line of defense is complement?

The complement system forms the first defense line of innate immunity and aids in the elimination of microbes and modified self-cells.

What line of defense is his immune system exhibiting?

First line of defense. The immune system of the body considers it as germs and starts releasing histamines against it. This alerts the brain and the person sneezes more the more it encounters the pollen grains.

What is the first line of defense in the nose?

nasal mucosaBecause normal breathing is through the nose, most airborne particles are filtered there; hence the nasal mucosa is the first line of defence against particles in the air. Pathogenic and non-pathogenic antigens continuously bombard the epithelium of the nasal airway.

Which of the following is the body’s first line of defense against foreign substances?

MacrophagesMacrophages. Macrophages are the body’s first line of defense and have many roles. A macrophage is the first cell to recognize and engulf foreign substances (antigens). Macrophages break down these substances and present the smaller proteins to the T lymphocytes.

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.

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.

What line of defense are natural killer cells?

The Innate vs. Adaptive Immune ResponseLine of DefenseCellsInnate (non-specific)FirstNatural killer cells, macrophages, neutrophils, dendritic cells, mast cells, basophils, eosinophilsAdaptive (specific)SecondT and B lymphocytes

What are the three branches of the immune system?

Humans have three types of immunity — innate, adaptive, and passive: Innate immunity: Everyone is born with innate (or natural) immunity, a type of general protection. For example, the skin acts as a barrier to block germs from entering the body.

What is the three lines model?

The Principles of the Three Lines Model describe the importance and nature of internal audit independence, setting internal audit apart from other functions and enabling the distinctive value of its assurance and advice.