Terms Related to Muscle Contraction

Terms related to muscle Contraction The Chaletal muscle contraction depends upon the gereve stimulus. In the resting condition, the Savecolemma and renic distribution are uneven on the inside and outside. Resting membrane potential (RNP) when the skeletal muscle is at mest condition inside sarcoterma the membra, polarity is more -ye as AAD compared to autode se Jomy it is called empwhich It becor of the eflex of potacciam ion in the membreage. Action potention when their is an impulse the muscle is being contract & the membrane polarin changes to-Jomy to +30mv. This phase is called Depolarizations is because of influx of Na con onto the muscle fibre Threeshold potential The minimum недитне amount of potential to genereate an action potentia is called threshold potential. An exeleta muscle is about -55mv. Depolarization: Auning Action potential the conflax of Na ron occur occur until the muscle is fully contracted stape. Here the influx of sist ion is much more than eflua of kem. Repolarization: The reversal of masting membrane potentio after depolarlization is called see polarizat because the closing of Naticon channel & more & Aion au'll move outside to make the inside membrane negative. Mercle Tumitel The contracting waveform of the muscle involves the mercle teeniten. For the contraction of muscle or muscle fibre, respond to any Stimulus above threshold potential. A munele treitch is into & phages Life: : usually dividof @Latent phase Contreaction phase Relaxation phase 7 The latent perciod in last for about. few milisecond asile the contraction phase is the action potential that Spread all over the sarcolemma requira more time than dasent period. 7 The muscle twitch response of muscle is the in voretary contication which is mostly occur withopet any consiousny of the person. Af the Relaxation period actre the cat fom treantparted bact into the darcoplasmie Meticular and the mgocin binding site haure covered by thlopany while the myocin head release from the action filaments. + Muscle feritching is also known as Keechculation. Common causes of muscle twitch are overexercise, calcium aficiency, consumption of tea and coffee, vitamin D deficiency, and magnesium deficiency. Ek sem ferers teritch fiber ashen moves the reges and has a contraction period of 10 ms, while a stow fevitch fiber that moves the leps has a contraction and Relaxation period of 100 ms. Refractory period: If two stimuli approach, one after the Other, the muscle will respond to the stimuli but not the stimuli. When a muscle fibre receives enough Stimulation to convert it temperature, less the excite obility will be able to raspend for a long time. The period with less excite ability is called the refractory period. The refractory period is the prering en which the muscle is unresponse any timertus. Motork can't → motor unit consist of a somatic motore geureon and all be reletal muscles fibrest enkichirs attached to it barnd stimulated by the motor Jeeran. 7 A single somatic motor geuren can contact within an average of 150 speletal muscle fibre y all the muscles fibres contract as a one unit. Summation & Tetanus The Summation it the imition in which a second stimulus has given after the pest Himulus is over but before the Eskeletal muscle has nelaxed. Then the Second contreantion will be stronger than first one. This phenomenon in hehich trees different stimuli arrived at different time caused eareper on stronger contraction Called summation. when a exeletal murde fiber stimulated at a rate of 20-30 timer per second. It can only able to partially relaxed. This condition is grown as unfused tetanus or incomplete tetanus. The Contreaction in which the individ muscle tewitches cannot be defected on Called pused tetanus/complete tedanus th based on the contraction ware patte the tetanus can be of 0 lypes - Fured enfured Structure & types of Bone The adult human skeleton consist of, 206 bones in which most of them parmed with both side of the body But incase of children ore now borey there are more than 206 bones because some there bowe are no fused beat joined at later half of their loge the based on the shape the tones of body classified into 5 main types: Kangbone @shart bone Flat bone Selamoid bone Juregular bone. Kamp Bene The preater in thein The thong compared to their width length consist of the shaft and other extermit and are sripndly curved fou strength Short bane:- These are the cube shaped yearly equal in length and width mostly consist of spongy. their Hosue. except tissue export Surface which has compact ba ex-Ankle Bone, wrist bone anod Avart (Carpal) snad to! nerist Bants biomp (Tarsal) - Nukle Bane logo Flat Bone:- Parcellare thin and composed of plates of compact a layer of spongy bone tissue ex- The Cranial bone Scapulas: bone bone, Herneum, hibs Flat Bone:- →These are then and composed of a nearl parrallest plates of compact borre anctomy a layer of spompy bone tissue ex The Cranial borne @capularem amad terreum, hibs, Sternum 4 Turrepular Bone: - It has complex shaped and does not pive a particular shape. ex- The vertebral Bone Hip tone and facial 60OR. Sesamoid Bone:- At pin'st the shape & like sesame seed It develops in Ceretain tendons aekare Consideratile friction intocker & also tansion different physical Stress Deceих. The no. of this bone they are of frien person to person and they are assified. not The majer exceptional Sesamusid bane is Kneecap (patella) ashich is tarpest Sesamoid bone. functionally, the sesamoid bane preotect the tendon from excessive tea and tension and they often change thein direction which improves the mechanic advantage of the object."