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CH 15
Ch 15 Innate Immunity
Question | Answer |
---|---|
Dermis | The skin's inner, thicker portion, composed of connective tissue |
Granulocytes | White blood cells containing large granules in their cytoplasm. |
Prostaglandins | Substances released by damaged cells that increase the effects of histamine and kinins. |
Chemotaxis | The movement of a cell either toward or away from a chemical stimulus |
Ciliary Escalator | Mechanism to move dust and microorganisms trapped in mucus out of the lower respiratory tract. |
Complement | A defensive system consisting of serum proteins that participate in the lysis of foreign cells, inflammation and phagocytosis. |
Cytolysis | The destruction of cells, resulting from damage to their cell membrane, that causes cellular contents to leak out. |
Dendritic cells | These phagocytic cells are found in th edermis |
Eosinophils | These cells release toxic proteins against parasitic helminths. |
Epidermis | The outer, thinner portion of the skin that is in direct contact with the external environment. |
Fever | Abnormally high body temperature. |
Inflammation | A host response to tissue damage characterized by redness, pain, heat and swelling |
Keratin | The protein found in the top layer of epidermal cells |
Lacrimal Apparatus | The mechanism that protects the eyes by manufacturing and draining away tears |
Leukocytes | White blood cells. |
Lymphocytes | These cells play a key role in specific immunity. |
Lysozyme | an enzyme that destroys the cell wall of bacteria |
Macrophage | The predominant phagocytic cell. |
Mast Cells | These cells release histamine. |
Monocytes | These cells mature into macrophages. |
Neutrophils | Polymorphonuclear leukocytes. |
Nonspecific Resistance | Defenses that protect us from any pathogen, regardless of species. |
Opsonization | The coating of microorganism with certain serum proteins that promote phagocytosis. |
Phagocyte | A cell capable of engulfing and digesting particles that are harmful to the body. |
Phagocytosis | Ingestion of particulate matter by a cell. |
Plasma | The liquid portion of the blood containing formed elements. |
Pseudopodia | Projections of the plasma membrane used by phagocytes to engulf particles. |
Pyrogens | Chemicals that trigger the hypothalamic “thermostat” to reset at a higher temperature. |
Resistance | Our ability to ward off disease through our defenses. |
Sebum | Oily substance that forms a protective film over the surface of the skin |
Serum | Plasma minus its blood clotting-proteins. |
Skin | The body organ that has the largest surface area |
Susceptibility | Vulnerability or lack of resistance |
Vasodilation | An increase in the diameter of blood vessels. |