Immune+System+DF

Immune System Class Notes

Immune System Protects our body against pathogens Pathogen: something from the outside Examples of pathogens Allergies Asthma Inflammation Pimple/Acne Cortisone: steroid hormone and inhibits inflammation Sprained Ankle Infection Viruses and Bacteria (1 nanometer is 1 billionth of a meter less than 100 nanometers || bigger than viruses are about 2000 nanometers || How are viruses are transmitted? Touch, Contact, Airborne, Bodily Fluids, Mucus How do immunizations protect people against viruses? Introduce harmless parts of the virus or a weakened virus so you can build immunity
 * virus
 * bacteria
 * Immune system is reacting against a foreign substance: allergen
 * Examples allergens: cat hair, pollen, grass, sun, cigarette smoke, pollution, foods, spices
 * Immune system reacts to something that is NOT a pathogen
 * Symptoms: sneezing, coughing, red eyes, itchy eyes, runny nose, rashes, asthma (can't take a full breath)
 * when a chemical triggers inflammation
 * over reaction of your immune response like a acne
 * anti-histamine prevents redness, itchy eyes, running nose
 * histamine: the chemical that causes the blood vessels to be leaky
 * inflammation of the lung
 * inhalers have drugs that inhibit inflammation
 * Is a immune defense, immune response
 * usually it is a response to cut: pathogens get inside the body
 * needed to prevent an infection
 * inflammation signs: swelling, redness
 * over reaction of your immune system
 * bacteria in the pore are harmless eat dead skin cells
 * get trapped in the white head or black head
 * bacteria attract white blood cells (pus)
 * white head (oil and dead skin cells) NO INFLAMMATION YET.
 * black head (white head exposed to air)
 * redness (is a sign that more blood is there) that bring immune cells to fight the infection
 * swelling: liquid an cells leaving the blood and entering the space outside the blood vessel
 * Inflammatory response
 * symptoms: red, swollen, painful
 * immune system can respond to pathogens (like bacteria in the pimple) and when cells have been damaged or hurt
 * when a cell breaks open it release its contents that normally should not be there out in open
 * the first response even though there is NO pathogen, is inflammation
 * brings repair proteins and cells too
 * advil: is a chemical that slows inflammation
 * ice: slows inflammation
 * raise your leg: slow blood flow
 * when pathogens attack and reproduce in the body
 * || **Viruses** || **Bacteria** ||
 * size || a lot smaller
 * host || inside cells, the host cell || most bacteria live on cells not in them, the host is the animal ||
 * response to antibiotics || No effect || kills bacteria ||
 * reproduction || Uses the host cell machinery. Hijacks host cell. || Bacteria divide in two (binary fission) ||
 * structure || round and covered in protein in membrane || rods, spheres, spiral ||