Why is respiratory obstruction reversible in asthma but not in emphysema?

Masseter and temporalis muscles are used for? What part of the renal tubule filters blood? Why is my boyfriend having seizures? How did cross-culture interactions and the black death influence the development of nation states? What does it mean if you have trouble breathing sometimes? Is the tendon bone supposed to move around? What is another term for the superior surface of the scapula where the biceps attach? How does a hot bath effect heart rate? What are the most common liver failure symptoms? I am a male who has very thick dark leg hair which i find embarrassing if drawn attention to Is there a way i can reduce the hair so that it isn't as noticeable? Which condition has symptoms that include puffiness of the hands and face? Are there replaceable car seat covers? Can someone being treated for bipolar still have manic episodes? Is there a phobia name for the fear of butterflies? How do you get rid of really bad period cramps? What damage does the virus Downloader Small 6 BA do and is there a way to eradicate it from the computer and prevent downloader virus infections? Narcolepsy is associated with a relative absence of a hypothalamic neural center that produces? tell you about a time when it was important to involve someone in a conversation? Should you worry if you have a lump halfway down the right side of your neck and it's not sore but you suffer bad headaches and tend to get a stiff neck quite often? What does a luteal phase defect cause?