B2 adrenergic mechanism
Give this one a try later!
b2 AdR →Gs → ↑cAMP
┤MLCK
List the principal muscles involved in inspiration and expiration, their roles, and their
innervation.
Give this one a try later!
Normal Inspiration is quiet
-diaphragm innervated-phrenic nerve
-assisted by 11 pairs of external intercostal muscles innervated by
intercostal nerves and accessory muscles of inspiration (scalene and SCM,
pectoralis minor)
, Normal Quiet Expiration: Passive involving relaxation of diaphragm
innervated by phrenic nerve
Forced Active Expiration: Involves 11 pairs of internal intercostal muscles
and 4 anterolateral abdominal wall muscles
In which portion of the respiratory tree is airway resistance greatest?
Give this one a try later!
Segmental bronchi and larger bronchioles (Gen. 3-Gen. 7)
Patients with COPD or asthma encounter greatest
resistance, inflammatory narrowing of airways, stumbling
block for getting air into and out of lungs
Remember, greatest in arterioles in venous system
Airflow is determined by
Give this one a try later!
Palv - Patm
What muscles are recruited for forced expiration?
Give this one a try later!
Give this one a try later!
b2 AdR →Gs → ↑cAMP
┤MLCK
List the principal muscles involved in inspiration and expiration, their roles, and their
innervation.
Give this one a try later!
Normal Inspiration is quiet
-diaphragm innervated-phrenic nerve
-assisted by 11 pairs of external intercostal muscles innervated by
intercostal nerves and accessory muscles of inspiration (scalene and SCM,
pectoralis minor)
, Normal Quiet Expiration: Passive involving relaxation of diaphragm
innervated by phrenic nerve
Forced Active Expiration: Involves 11 pairs of internal intercostal muscles
and 4 anterolateral abdominal wall muscles
In which portion of the respiratory tree is airway resistance greatest?
Give this one a try later!
Segmental bronchi and larger bronchioles (Gen. 3-Gen. 7)
Patients with COPD or asthma encounter greatest
resistance, inflammatory narrowing of airways, stumbling
block for getting air into and out of lungs
Remember, greatest in arterioles in venous system
Airflow is determined by
Give this one a try later!
Palv - Patm
What muscles are recruited for forced expiration?
Give this one a try later!
