nervous tissue is through the use of pharmacological agents such as 5,7-dihydmxytryptamine (5,7-DHT) and 5,6_dihydroxytryptamine neurotoxins. In molluscs,
nervous tissue isthrough the use of pharmacological agents such as 5,7-dihydmxytryptamine(5,7-DHT) and 5,6_dihydroxytryptamineneurotoxins. In molluscs,