anatomy II chapter 20

interferon alpha slide 103

• produced by virus-infected cells

• attract and stimulate NK cells and enhance resistance to viral infection

interferon beta

• secreted by fibroblasts

• slow inflammation in damaged area

interferon gamma

• secreted by T cells and NK cells

• stimulated macrophage activity

1. interferon alpha

2. interferon beta

3. interferon gamma

what are the 3 types of interferons?

1. classical pathway

2. lectin pathway

3. alternative pathway

what are the 3 possible pathways of the complement system?

complement system

• complements the action of antibodies

• over 30 special proteins form system

• proteins interact with one another in chain reactions or cascades

inflammation or inflammatory response

localized tissue response to injury, producing the cardinal signs and symptoms of inflammation

• local redness

• swelling

• heat

• pain

• sometimes lost function

what are the signs of the inflammation response?

pyrogens

• circulating fever-inducing proteins

• reset temperature thermostat in hypothalamus

  • raise body temp

• beneficial in limits

• may inhibit some viruses and bacteria

• increases metabolic rate, which may accelerate tissue defenses and repair process

describe how a fever can be beneficial.

ended on slide 119