Select the correctly described examples of host defense mechanisms. Check All That Apply Innate anatomical and physiological barriersInnate anatomical and physiological barriers Innate cellular and chemical defensesInnate cellular and chemical defenses Innate host defenses due to B and T cells and their productsInnate host defenses due to B and T cells and their products Use of drugs and antibioticsUse of drugs and antibiotics Specific recognition of invaders by physical barriersSpecific recognition of invaders by physical barriers

Answers: examples of host defence mechanism include: Innate anatomical and physiological barriers, Innate cellular and chemical defenses.

Explanation:

The capability of the human body to resist almost all types of organisms or toxins that tend to damage the tissues and organs is known as IMMUNITY. This host defence mechanism can be classified into INNATE or adaptive immunity.

The immunity that results from general processes, rather than from processes directed at specific disease organisms is called the INNATE IMMUNITY. The anatomical and physiological barriers of the innate immunity provides the first line of defence against pathogens. Examples of these barriers of the innate immunity includes:

--> Destruction of swallowed organisms by the low stomach pH and digestive enzymes

--> The vigorous mucociliary clearance mechanisms of the respiratory airways and lungs.

--> Resistance of the skin to invasion by organisms

While examples of innate cellular and chemical defenses include:

--> Phagocytosis of bacteria and other invaders by white blood cells and cells of the tissue macrophage System

--> lysozymes, a mucolytic polysaccharide that attacks bacteria and cause them to dissolute.

--> basic polypeptides which react and inactivate certain types of gram- positive bacteria

-->natural killer lymphocytes that can recognize and destroy foreign and tumor cells.

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