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The first line of defense against a pathogen would be barriers. Ex. The skin, Breathing Passages, and The Mouth and stomach.
An immune response is part of the body's defense against pathogens in which cells of the immune system react to each kind of pathogen with a defense targeted specifically toward that pathogen.
antibody production by plasma cells
The first line of defense includes the skin, breathing passage, mouth and stomach.
The pathogen tries to infect the body. The defense mechanism of the body resists the entry of the pathogen. If pathogen succeeds the infection is established and the body becomes sick.
blood
Your skin and your mucus membranes are your body's first line of defense against any pathogen whether that be dust, or a virus!
Non specific defense mechanisms are more effective because they work against all bacteria and viruses. Examples are skin or tears. Specific defense mechanisms like antibodies work against one type of bacteria or virus. They're needed if a pathogen gets past the nonspecific defense mechanisms.
T lymphocytes
The body's three lines of defense against a pathogen (germ) are: 1. Anatomical and physiological barriers-Includes skin, hair, mucous membranes, saliva, tears, stomach acid, pH, temperature. 2. Non-specific response-Includes phagocytosis of pathogen, inflammation of tissues, vasodilation (increased blood flow to area), and swelling. 3. Specific response-antibody production and cell mediated immunity to particular pathogen. Maintained indefinitely.
The body's three lines of defense against a pathogen (germ) are: 1. Anatomical and physiological barriers-Includes skin, hair, mucous membranes, saliva, tears, stomach acid, pH, temperature. 2. Non-specific response-Includes phagocytosis of pathogen, inflammation of tissues, vasodilation (increased blood flow to area), and swelling. 3. Specific response-antibody production and cell mediated immunity to particular pathogen. Maintained indefinitely.
It is a non-specific Immune response as it does not change based on interaction with a pathogen and will activate regardless whether the pathogen in question has been encountered previously. Commonly referred to as being part of the "Second Line of Defence".