Biomaterial Database

[Action potentials of the fast and slow muscle fibers of the bog turtle Emys orbicularis]. 1977

I I Lebedinskaia, and G A Nasledov

In skeletal muscles of the tortoise E. orbicularis, fast and slow muscle fibers were found which differ in the lipid content and electrophysiological properties. Fast fibers contain small amounts of lipid inclusions. In response to direct electrical stimulation they produce fast action potentials (AP) which are capable of rhythmic activity during prolonged depolarization. Slow fibers are rich in lipid inclusions. Their AP differs from that of fast fibers by slow onset, and decay, lower gradient of rise, lower amplitude and lower velocity of propagation. These fibers are not capable of rhythmic activity. The data obtained show that with respect to their morphological and physiological properties slow muscle fibers of the tortoise differ from tonic amphibian fibers, but exhibit the most similarity to slow avian fibers.

UI	MeSH Term	Description	Entries
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D006651	Histocytochemistry	Study of intracellular distribution of chemicals, reaction sites, enzymes, etc., by means of staining reactions, radioactive isotope uptake, selective metal distribution in electron microscopy, or other methods.	Cytochemistry
D000200	Action Potentials	Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.	Spike Potentials,Nerve Impulses,Action Potential,Impulse, Nerve,Impulses, Nerve,Nerve Impulse,Potential, Action,Potential, Spike,Potentials, Action,Potentials, Spike,Spike Potential
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D014426	Turtles	Any reptile including tortoises, fresh water, and marine species of the order Testudines with a body encased in a bony or cartilaginous shell consisting of a top (carapace) and a bottom (plastron) derived from the ribs.	Sea Turtles,Terrapins,Tortoises,Sea Turtle,Terrapin,Tortoise,Turtle,Turtle, Sea,Turtles, Sea
D050356	Lipid Metabolism	Physiological processes in biosynthesis (anabolism) and degradation (catabolism) of LIPIDS.	Metabolism, Lipid