Muscle contraction

acetylcholine (Ach) and 5-hydroxytryptamine (5-HT) was administered to organ bath containing rat ileum. Ach and 5-HT induced contractions from 3nM (Fig. 1) and 10nM (Fig. 2) onwards respectively, both generating a shallow slope at the beginning of the concentration-response curve. EC50 of Ach is 7.47 x 10-7M whereas EC50 of 5-HT is 7.97 x 10-7M. The contraction generated by Ach and 5-HT was expressed in % Emax. As shown in Fig. 1 and 2, % Emax increased with increasing agonists…

The Effect of Spider Venom on Muscle Contraction Jessica Martinez and Stephanie Perez Eastfield Community College Overview A patient with the name Bobby presented with the chief complaint: pain on one arm that originated in one area and has spread up the arm. Along with pain in the arm, the patient experienced sweating and abdominal pain and cramping. The patient explained that he was photographing the sunset at the beach when he felt a burning sensation and realized he had been bit by…

recruitment: As stimulus voltage increased contraction force increased until it plateaued at the stimulus voltage of 120 mV (Fig 1A) As stimulus voltage increased contraction force increased. (Fig 1B). Our results are consistent with the current knowledge of twitch recruitment in skeletal muscles. As the stimulus voltage increase, more motor units were activated increasing contraction force. Our results mean that that function organism’s skeletal muscles are able to recruit motor units to make…

a given skeletal muscle. Maximum contraction is the ability of the muscle to recruit and produce its greatest force during a contraction, and we can observe these effects by using a grip force transducer, which records the functional grip force of the hand. Therefore, the purpose of this lab was to discern how varying temperatures affect maximum contraction. I hypothesized that; cold temperatures will decrease the rate of muscle fatigue and provide for a longer max contraction, while hot…

Cheek Radford University  Introduction Every physically active person knows how it feels to be in the middle of a sporting event or workout and suddenly experience a muscle cramp. These cramps are inhibiting and painful, as well as cause a decrease in performance. Exercise-associated muscle cramps, or EAMC, are defined as skeletal muscle cramps that occur during or directly after exercise (Miller et al., 2010). Over the years, athletes and trainers have proposed several treatments or “home…

- Congenital Heart Defect (patent ductus arterious/pda) - Asthma - GERD – G-tube feeding - Dysphagia - Mixed receptive -expressive language disorder - Allergic to Bactrim - Palatal Talon Cusps - Bilateral Epicanthal folds Subjective findings - Prematurity - Lack maternal pre-natal care - Non- progressive /unproductive labor (delivered via C- Sec) Objective findings - Impaired development in all areas - Poor sense of balance, coordination, and motor planning - Limited endurance to gross motor…

research shows from the article,"Erythropoietin increases production of red blood cells and hemoglobin, resulting in improved movement of oxygen to the muscles. Epoetin, a synthetic form of erythropoietin, is commonly used for building endurance athletes but, hasn't been proven help with strength. Also, it puts weight on people giving not much muscle mass." Steroids are a not a sensible use because, dealers just change the ingredients and not put the actual steroid or dealers just want the money…

cramps are really very much painful and these cramps are nothing but internal muscle injuries of your legs. You should be quite careful so that the leading causes of leg cramps can be easily avoided so that you do not have to face unwanted symptoms. Some leading causes of leg cramps that have been discovered currently are flat feet, alcohol abuse, kidney failure, diabetes, PAD, dehydrations, excessive medications, muscle fatigue, diarrhea, pregnancy, excessive exercise, overweight, circulation…

build bigger and stronger skeletal muscle. Flexing in the mirror for self-confidence to building muscle for impressing the ladies, little do these individuals realize how their muscle works while they pump the iron. The muscular system is the network of tissues that help controls movement throughout the body using contraction and relaxation of different muscles. This system is divided into two classes, skeletal (voluntary) and smooth (involuntary). Skeletal muscles are known as voluntary because…

Introduction: The use of electromyography (EMG) to monitor muscle tissue from surface skin provides important information about the components of electrical activity—namely motor unit (MU) activation—during a muscle contraction (Cashaback, Cluff & Potvin, 2013). Observing electrical activity of a muscle with EMG is a user friendly and non-invasive tool researchers use when investigating muscle physiology (Camata et al., 2009). EMG is commonly used to correlate EMG signal with fatigue by…