Temperature gradients drive mechanical energy gradients in the flight muscle of Manduca sexta
نویسندگان
چکیده
منابع مشابه
Temperature gradients drive mechanical energy gradients in the flight muscle of Manduca sexta.
A temperature gradient throughout the dominant flight muscle (dorsolongitudinal muscle, DLM(1)) of the hawkmoth Manduca sexta, together with temperature-dependent muscle contractile rates, demonstrates that significant spatial variation in power production is possible within a single muscle. Using in situ work-loop analyses under varying muscle temperatures and phases of activation, we show tha...
متن کاملTemperature gradients in the flight muscles of Manduca sexta imply a spatial gradient in muscle force and energy output.
There is a significant dorso-ventral temperature gradient in the dominant flight muscles [dorsolongitudinal muscles (DLM(1))] of the hawkmoth Manduca sexta during tethered flight. The mean temperature difference was 5.6°C (range=3.8-6.9°C) between the warmer, ventral-most subunits and the cooler, dorsal-most subunits. As force generation in muscle depends on temperature, the mechanical energy o...
متن کاملThe Organization of Flight Motoneurones in the Moth, Manduca Sexta
The morphology and the innervation of the main wing depressor muscles have been studied. The motoneurones to these muscles have dendrites ipsilateral to the muscle they innervate and located in the dorsal neuropile. With the exception of one motoneurone, to the dorsal longitudinal muscle, all motoneurone cell bodies are ipsilateral to the muscle they innervate. The morphologies of individual co...
متن کاملTemperature regulation of the sphinx moth, Manduca sexta. I. Flight energetics and body temperature during free and tethered flight.
The sphinx moth, Celerio lineata, is thought to vary the rate of heat production in response to different rates of heat loss (Heath & Adams, 1965, 1967). It was proposed that during flight in cold air the attitude of the wings is changed, resulting in increased 'drag', greater flight effort, and greater rates of heat production (Adams, 1969). However, direct evidence has not been presented to s...
متن کاملDependence of flight on temperature regulation in the moth, Manduca sexta.
Some insects markedly increase their internal temperature during flight. Locusts (Church, i960) maintain an internal thoracic temperature 6 °C in excess of the ambient temperature. The sphinx moth Celerio lineata raises its temperature to a minimum level before take-off, and during flight it maintains an internal temperature within a range of 4 °C independent of the external temperature (Adams ...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 2012
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.062901