MBIOS 101 1nd Edition Lecture 22 Outline of Last Lecture - Chemical Controls1. Mutualism 2. Commensalism 3. Parasitism4. Ectopic host Outline of Current Lecture – 1. Lines of Defensea. First line i. Eyesii. Earsiii. Nasal passage b. Secondc. Third Current Lecture 1. Lines of Defensea. Firsti. Characteristics1. Intact skin2. Mucous membranes and their secretions3. Normal microbiota4. Chemical or physical barriersii. NFO are a part of this barrier 1. On stomach2. On skinThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.3. Eyes4. Noseiii. Eyes1. Eye infections/ Conjunctivitis2. Things get in eyes all the time but the eye is designed to flush things out3. Gonorrhea can get into babies eyes during birth – special treatment for this4. Mucus IgA: antibody (prevent virus bacteria)a. oils b. lysozymes lytic enzyme 5. Eyelashes – motion of blinking eyelashes fan stuff away from eyes so nothing attaches6. Tears – Flushing mechanism - tearsa. Lysozymeb. IgAc. Decrease in pH (acidic)7. Normal Flora Organism a. They protect their environmentb. In eyes they like pH 68. Eye mites a. They clean up area b. Live in the ducts of the eyelash9. Contactsa. First came out in the 70s b. Rigid at firstc. Cleaning solutions killed NFO causing their to be conjunctivitis d. Had to develop them to work with the eye iv. Ear1. Another portal of entry 2. Eardrum a. Protects the semicircular canal (important for balance) anddrainage canalb. Can become infected – ear aches come from bulging eardrum3. Earwax – traps oils, dirt, etc.a. Protection with lysozyme b. Builds up sometimesc. Little ear ache can result d. Use Hydrogen peroxide to flush ear (use sparingly- DO NOTOVERUSE- can cause damage)4. Cooler temperature also lower pH5. Ear hair – traps thingsv. Nasal passage1. Protect the lungs - breathing2. Nose hair3. Mucus- produced by Golbet Cellsa. Vit A – excellent antioxidant (protects viruses and bacteria from attaching), health of goblet and epithelial cells b. IgA4. Cilia – sweeping motion/ trap 5. Sneezing – coughing6. Sinus infection – mucus is green 7. NFO (protect their home)b. Secondi. Phagocytes, such as neutrophils, eosinophils, dendritic cells, and macrophagesc.
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