Calcium movements in single crustacean muscle fibres
نویسندگان
چکیده
منابع مشابه
Muscle fibres and efferent nerves in a crustacean receptor muscle
The accessory flexor muscle of the crab myochordotonal organ consists of two kinds of muscle-fibres. In one type the fibrillar material has a uniform punctate appearance in cross-section. The Z bands are often broken across the fibre width and are spaced 2 to 3/n apart. These resemble the 'Fibrillenstruktur' muscle of vertebrates. In the second fibre type the fibrillar material appears as large...
متن کاملCalcium Movements in Muscle
The movements of calcium in muscle have been followed during contraction and contracture to test the hypothesis that the release of calcium from the surface of the muscle membrane during stimulation initiates the contractile mechanism. Nitrate ion increases the calcium influx during a single twitch and during potassium contracture, and also increases the tension developed. The increased entry o...
متن کاملUltrastructure and Calcium Transport in Crustacean Muscle Microsomes
Fragmented sarcoplasmic reticulum (FSR) from crustacean muscle was examined following preparation by a variety of electron microscopic techniques. The 30-40 A particles which appeared on the outer surface of FSR vesicles following negative staining were not observed following preparation by freeze-drying, freeze-etching, thin sectioning, or critical-point drying. Crustacean FSR exhibited high v...
متن کاملIons on Calcium Currents and Contractil ity in Single Muscle Fibres of t h e Crayfish
Abstract. Muscle fibres of crustaceans represent an useful model for studying the mode of action of substances influencing calcium channels as the membrane generates the active responses on a pure calcium principle and the excitation contraction link is dependent on external calcium. We followed the effect of P b 2 + ions (1-300 /imol/1) on contractile responses in single muscle fibres of the c...
متن کاملThree components of calcium currents in crayfish skeletal muscle fibres.
The coexistence of multiple types of calcium currents within the same cell has been demonstrated in voltage clamp experiments in several cells (for review see Hagiwara et Byerly 1981). Single channel recordings confirmed the existence of distinct electrical and pharmacological properties of Ca channels and, based on these differ ences, three types of Ca channels were characterized (classified)...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1974
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1974.sp010705