24699
5 - HT1B receptors are located in the axon terminals of both serotonergic and non - serotonergic neurons , where they act as inhibitory autoreceptors or heteroreceptors , respectively .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None