Epinephrine And Inspiration

During normal or quite breathing, inspiration is accomplished by contractions of the diaphragm and muscles between the ribs; in contrast expiration does not require any contraction from the muscle. Since there’s no muscles activity during expiration, the inward forces of elastic recoil is what gives the lung an elastic properties or the ability of the lung tissue to bounce back to its normal volume after the expansion in inhalation.

Epinephrine enhances sympathetic activity to dilate airways and decrease airway resistance, which had been elevated by the effects of histamine on the bronchioles. It also raises blood pressure, which enhances oxygen delivery to tissues by increasing flow.

Damage to the respiratory system from cigarette smoking