Receptor
|
Secretions
|
Bronchial tone
|
|
Sympathetic
|
Beta 2
|
Increases
|
Decreseas ( broncho- relaxation )
|
Alfa 1
|
Decreases
|
||
Parasympathetic
|
Muscarinic ( M )
|
Increases
|
Increase (broncho constrictions )
|
Asthma
- Maximal bronchoconstriction – 6 am
- Maximal bronchodilation – 6 pm
- Therefore asthma is more common at late night and early morning
Bronchodilators
|
Bronchoconstrictors
|
VIP
|
Irritents
|
Cool air
|
|
Exercise
|
|
Substance P
|
|
Adenosine
|
|
Cytokinens
|
|
Inflammatory agents
|
Labels: Revision, RS, RS Revision