Excitation ofMytilussmooth muscle
نویسندگان
چکیده
منابع مشابه
Excitation coupling in muscle.
How much mechanical activity follows a membrane depolarisation of known amplitude and duration? For the steady state case we have the result of Hodgkin (1958), significant in view of what follows, that contracture tension varies for low levels approximately as the sixth power of the depolarisation. To answer the more difficult question involving time, one might think that something like "voltag...
متن کاملMembrane excitation in cardiac muscle.
The contributions made during the past 10 years are reviewed. Intracellular recording has made it possible to state absolute values for the cardiac resting potential (90 mv., inside negative to outside) and the "overshoot" during activity (30 mv., inside positive to outside). The surface membrane of a resting fiber is considered to be predominately permeable to K ions. During activity, Na condu...
متن کاملExcitation of Cardiac Muscle Cells
was used to deliver rectangular pulses for extracellular field stimulation of individual heart cells. We found that single frog and guinea pig ventricular myocytes are excitable with rectangular pulse field stimulation over a wide range of pulse durations, ranging from 10 msec to as little as 20 ,usec. The excitation field strength varies inversely with pulse duration as described by the Weiss-...
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Skeletal muscle atrophy can be defined as a wasting or decrease in muscle mass and muscle force generation owing lack of use, ageing, injury or disease. Thus, the etiology of atrophy can be different. Atrophy in denervated muscle is a consequence of two factors: 1) the complete lack of motoneuron activity inducing the deficiency of neurotransmitter release and 2) the muscles disuse. The balance...
متن کاملExcitation Contraction Coupling in Cardiac Muscle
It is well established that excitation contraction (EC) coupling in cardiac myocytes is mediated by the entry of calcium ions (Ca 2 ) from the bathing medium into the cell cytoplasm (Fabiato, 1985), which then triggers calcium-induced calcium release (CICR) from the sarcoplasmic reticulum (SR). More recently, it was proposed that a second, quite separate, EC-coupling process, mediated by an eff...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1967
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1967.sp008336