Title: Spontaneous activity of foregut and hindgut visceral muscle of the locust, locusta migratoria—I. Normal activity and the effect of KCl depolarization and glutamate
Abstract: Abstract 1. Locust foregut and hindgut differed in their spontaneous contractility. The foregut was constantly active with regular contractions or with a fast rhythm incorporating larger irregular contractions. 2. The hindgut showed bursts of large regular contractions interrupted by periods of quiescence. 3. Foregut fluid, of unknown content, inhibited rhythmic contractions but induced large foregut tonic contractures. 4. High KCl salines induced contractures in both gut sections, but the tension/[K]0 curve showed no clear mechanical threshold. 5. Glutamate (10−5 M) increased contraction frequency in the hindgut and stimulated quiescent preparations. At 10−4M, glutamate usually increased foregut contraction amplitude and frequency, this action being inhibited by 10−5 M tvramine. 6. Considerable differences exist in natural rhythm, contractile properties and drug responses between these two divisions of locust gut.
Publication Year: 1982
Publication Date: 1982-01-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 12
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot