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1. Gunea-pig tracheal and lung segments were systematically examined for adrenergic nerves using the fluorescence histochemical technique. Fluorescence in nerves was enhanced with alpha-methylnoradrenaline or by pretreating animals with nialamide. 2. There was a progressive decrese in density of fluorescent fibres in airway smooth muscle from the laryngeal end of the trachea, which was densely innervated, to the bronchioles, which contained only occasional fibres. This was despite obvious fluorescence in blood vessels in the lung. 3. It is suggested that, if adrenergic nerves are involved in reflex bronchodilatation in this species, they directly control larger airways and other factors, e.g. non-adrenergic inhibitory nerves, may be important in the control of smaller airways.
S R O'Donnell, and
N Saar, and
L J Wood
May 1969,
Archives internationales de pharmacodynamie et de therapie,
S R O'Donnell, and
N Saar, and
L J Wood
May 1985,
Experimental eye research,
S R O'Donnell, and
N Saar, and
L J Wood
December 1992,
Biochemical and biophysical research communications,
S R O'Donnell, and
N Saar, and
L J Wood
February 1961,
British journal of pharmacology and chemotherapy,
S R O'Donnell, and
N Saar, and
L J Wood
February 1995,
Neuroscience letters,
S R O'Donnell, and
N Saar, and
L J Wood
January 1983,
Cell and tissue research,
S R O'Donnell, and
N Saar, and
L J Wood
January 1984,
Cell and tissue research,
S R O'Donnell, and
N Saar, and
L J Wood
April 1983,
Neuroscience letters,
S R O'Donnell, and
N Saar, and
L J Wood
March 1981,
Nature,
S R O'Donnell, and
N Saar, and
L J Wood
July 1994,
Thorax,
