Question

Asthma effects the respiratory system. It also causes the "immune system" to action by activating defense cells. Please expound on how the defense cells effect the muscles around the airway system. Does it causes the muscles to swell or contract?

Answer 1

An asthma attack is when the muscles in your airway swell up, causing your airways so shrink.  This is due to an allergic reaction, in witch you inhale something and your body "over reacts" to it.