5-Hydroxytryptamine (5HT) was measured in the nervous and heart tissues of Locusta migratoria migratorioides in concentrations of 2·34 and 2·69 μg/g wet weight respectively. Among catecholamines, dopamine was found in the nervous tissue (1·31 μg/g wet weight) as well as in the heart (2·42 μg/g wet weight). Noradrenaline was present only in the brain, but in smaller amounts (0·24 μg/g wet weight) than dopamine. Adrenaline was found neither in the ganglia nor in the heart. On the basis of their occurrence in the CNS, 5HT, dopamine, and noradrenaline, and in the heart 5HT and dopamine can be regarded as transmitter or modulator substances.
ASJC Scopus subject areas
- Insect Science