Endomysium: Mostly reticulum fibers, penetrates interior of each fascicle and separates each muscle fiber individually.…
1. There is a greatr concentration of Na+ f ; there is a greater concentration of K+ e .…
What is the voltage beyond which there were no further increases in active force? Maximal voltage: 8.5 V…
Know the three those of muscle tissue and give the function and location of each type.…
Part 5: Identify the type of muscle tissue on your lab report worksheet (skeletal, smooth, or cardiac). Bones and muscles are both important in their own right, but it is when the two systems work together that “the magic happens”.…
When muscle cells begin to repolarize, first the acetychloine is removed from the receptors on the cells. This in turn causes the receptor mediated Na+ leak channels to close. Voltage gated potassium leak channels open as a result. As K+ ions begin coming into the cytoplasm to repolarize. When the membrane potential reaches a specific level, the voltage gated potassium leak channels close as well. The sodium potassium pump works throughtout this process, by pumping Na+ ions out and K+ ions into the cells (using ATP, by a process called active transport).Ca2+ ions are pumped back into the SR by means of active transport. The membrane potential is then restored to the resting potential of…
Type IIa red muscle fibers are fast oxidative glycolytic, larger than type I fibers, have a faster firing rate than type I fibers, but fatigue more rapidly. They are known for having a fast shortening speed and well developed capacity for energy transfer from aerobic and anaerobic sources. Type IIa are suitable for bodybuilding exercises, such as chest press, squat, and deadlift, with short to moderate duration and moderate to high intensity work. Mesomorphs, a person with a muscular build, demonstrate the Type IIa fibers. In order to train these Type IIa fibers, one must do a combination of plyometric or weight training, such as box jumps, burpees, chest press, man makers, etc. Mesomorphs also use type IIx muscle fibers. Type IIx muscle fibers, which are white, are fast glycolytic muscle fibers, have the most rapid shortening velocity and the greatest anaerobic potential. They are the largest muscle fiber, have the highest output, and fatigue the quickest out of all…
Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Skeletal Muscle Fiber: Skeletal muscle cells that are composed of hundreds to thousands of individual cells that produce muscle tension. These fibers are what move our bodies and generate muscle tension/force that enables us to have manual dexterity.…
The functional unit of contraction is the sarcomere. Muscle cells contain many sarcomeres arranged in parallel. The muscle cell takes on a characteristic banded appearance because of the regular arrangement of the sarcomeres. This is called striation.…
Muscular System: The muscular systems is responsible for maintaining posture, circulating blood, and movement. Visceral muscle is found inside of organs like the stomach, intestines, and blood vessels. The stomach secretes acid and enzymes that digest food. The muscular system also has another variant which is skeletal muscle. The skeletal muscles are attached to bones and move various parts of the body. The biceps, pectoralis major, triceps, nasalis, and deltoid are five major organs in the muscular system. The biceps main job is to control the movement of the elbow and shoulder. The pectoralis major make up most of the chest bulk. The triceps help extend and retract the forearm. The nasalis compress nasal cartilage. The deltoid is responsible…
Human skeletal muscle consists of hundreds of individual cylindrically shaped cells (called fibers or myofibers) bound together by connective tissue. In the body, these muscles are stimulated to contract by somatic motor nerves that carry signals in the form of nerve impulses from the brain or spinal cord…
(a.) The region of a myofibril between two successive Z discs is a sarcomere. It averages 2 micrometers long and is the smallest contractile unit of a muscle fiber. It contains an A band flanked by half an I band at each end. Within each myofibril, the sarcomeres align end to end like boxcars in a train. (b) In a relaxed muscle fiber, the thin and thick filaments overlap only at the ends of the A band. The sliding filament model of…
The table is clear, well-organized, written in complete sentences, correct language use, etc. (0 to 5 points)…
(which is actually one long muscle cell) has hundreds of nuclei along its length to speed up the chemical processes that…
Name some smooth muscle functions (click the “Tissue Locations” button). Smooth muscle is found within the walls of all hollow or tubular organs of the digestive, respiratory, urinary, and reproductive tracts.…