Cholinergic sensitivity: normal variability as a function of stimulus background.
Science
; 172(3983): 583-5, 1971 May 07.
Article
em En
| MEDLINE
| ID: mdl-4324471
ABSTRACT
The sensitivity of the normally innervated iris sphincter to its neuro-transmitter, acetylchloline, and to relatd agents varies inversely with the preexisting physiological stimulus background, that is, the environmental light intnsity. This normal variability suggests the existence of a negative feedback mechahnism whereby sensitivity of the effector cell is modutlated by a product of neuronal activity.
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Base de dados:
MEDLINE
Assunto principal:
Parassimpatomiméticos
/
Adaptação Ocular
/
Iris
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
1971
Tipo de documento:
Article