Higher mitochondrial density in slow versus fast lobster sensory neurons.
The stretch-sensitive muscle receptor organ (MRO) in the abdomen of the lobster Homarus americanus contains an identifiable fast and a slow sensory neuron. Morphometric analysis of electron micrographs of areas through the somata of these neurons revealed a higher density of mitochondria in the slow versus the fast cell (19 vs 15%). Such differences in oxidative capacity are closely matched with differences in their physiological performances.
Life Sciences Division, University of Toronto, Scarborough, Ont., Canada.
J I
JI
Mayes
C K
CK
Govind
D000818:Animals; D008854:Microscopy, Electron; D008928:Mitochondria / Q000166:cytology* / Q000502:physiology / Q000648:ultrastructure; D008121:Nephropidae / Q000033:anatomy & histology / Q000378:metabolism* / Q000502:physiology; D009475:Neurons, Afferent / Q000378:metabolism* / Q000502:physiology / Q000648:ultrastructure