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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. |