Sustained contraction is called
II. Muscles in vitro can exhibit twitch, summation, and tetanus. A. The rapid contraction and relaxation of muscle fibers is called a twitch. B. A whole muscle also produces a twitch in response to a single electrical pulse in vitro.1. The stronger the electric shock, the stronger the muscle twitch, whole muscles can produce graded contractions.2.. The motor neuron and the muscle fibers it innervates are called a motor unit. 1. When a muscle is composed of many motor units (such as in the hand), there is fine control of muscle contraction. 2. The large muscles of the leg have relatively few motor units, which are correspondingly large in size. 3. Sustained contractions are produced by the asynchronous stimulation of different motor units. Mechanisms of Contraction. I. Skeletal muscle cells, or fibers, contain structures called myofibrils. A. Each myofibril is striated with dark (A) and light (I) bands; there are Z lines in the middle of each I band.. The motor neuron and the muscle fibers it innervates are called a motor unit. 1. When a muscle is composed of many motor units (such as in the hand), there is fine control of muscle contraction. 2. The large muscles of the leg have relatively few motor units, which are correspondingly large in size. True Even when a muscle appears to be a rest, a certain degree of sustained contractions still take place within it's muscle cells. It is the result of repeated nerve impulses traveling from the spinal cord and stimulating a few muscle cells.uscle tone is the visual property of muscle. If u can't see the muscles because they are covered in fat, or they just aren't there, u don't have a muscle tone, a bodybuilder has a very good muscle tone. My resource is my memory so i could be wrong, but i thought that was what it was. The complete contraction of a muscle, without the ability to relax, is called _____. a sustained contraction. fatigue. tetanic contraction. treppe. 36. The constant contraction of a percentage of fibers within a muscle is referred to as _____.tetany. tonus. sustained contraction. summation. 37. Contractions called _____ occur whenever the forces applied to a muscle are increased, but the muscle does not appear to be moving.he period of time between the stimulus and contraction is called the _____. latent period. refractory period. contraction period. relaxation period. 34. The period of time in which a muscle will not respond to a stimulus is called the _____. Briefly explain where the energy comes from in a one-minute sustained muscle contraction? During a sustained one-minute muscle contraction, the first 4-6  seconds of energy comes from stored ATP. The next 6-15 seconds of  energy comes from the transfer of creatin … e phosphate and ADP to  form additional ATP.The last 15-60 seconds of energy comes from  glycolysis.uring a sustained one-minute muscle contraction, the first 4-6  seconds of energy comes from stored ATP. During a sustained one-minute muscle contraction, the first 4-6  seconds of energy comes from stored ATP.The next 6-15 seconds of  energy comes from the transfer of creatin … e phosphate and ADP to  form additional ATP. The last 15-60 seconds of energy comes from  glycolysis.uring a sustained one-minute muscle contraction, the first 4-6  seconds of energy comes from stored ATP. The cell membrane of a muscle cell is called the sarcolemma, and this membrane, like that of neurons, maintains a membrane potential. So, impulses travel along muscle cell membranes just as they do along nerve cell membranes. However, the 'function' of impulses in muscle cells is to bring about contraction. - Because skeletal muscle is voluntary muscle, contraction requires a nervous impulse. So, step 1 in contraction is when the impulse is transferred from a neuron to the SARCOLEMMA of a muscle cell. Muscle tone is the visual property of muscle. If u can't see the muscles because they are covered in fat, or they just aren't there, u don't have a muscle tone, a bodybuilder has a very good muscle tone. My resource is my memory so i could be wrong, but i thought that was what it was.An involuntairy contraction of a muscle is a spasm, i think to know that also.uscle tone is the visual property of muscle. If u can't see the muscles because they are covered in fat, or they just aren't there, u don't have a muscle tone, a bodybuilder has a very good muscle tone. My resource is my memory so i could be wrong, but i thought that was what it was. Skeletal muscles can do a short, single contraction (twitch) or a long, sustained contraction (tetanus), and might ache after strenuous exercise. The stomach is an organ of the alimentary canal, a muscular tube that forms part of the digestive system. The wall of the stomach contains smooth muscle tissue.keletal Muscles Bodily movement is carried out by the interaction of the muscular and skeletal systems. For this reason, they are often grouped together as the musculo-skeletal system. Muscle is attached to bone by tendons and other tissues, and exerts force by converting chemical energy into tension and contraction. B. The motor neuron and the muscle fibers it innervates are called a motor unit. 1. When a muscle is composed of many motor units (such as in the hand), there is fine control of muscle contraction. 2. The large muscles of the leg have relatively few motor units, which are correspondingly large in size.. The motor neuron and the muscle fibers it innervates are called a motor unit. 1. When a muscle is composed of many motor units (such as in the hand), there is fine control of muscle contraction. 2. The large muscles of the leg have relatively few motor units, which are correspondingly large in size.
Muscles tetanus