Muscle Tissue
Skeletal muscle
Responsible for movement, posture, support, storage of nutrients and maintain body temperature
Frequency of stimulation
Tension developed depends on the frequency of stimulation
Isotonic Contraction
tension rises and the skeletal muscle's length changes.
Sarcomeres
Contains thick and thin filaments
Twitch
depends on the type of muscle stimulated and an average twitch lasts 7 to 100msec in our body.
Incomplete Tetanus
when a muscle producing almost peak tension during rapid cycles of concentration and relaxation
Endomysium
Layer of skeletal muscle that is located within a fassicle and has no blood vessels, surrounds the skeletal muscle and cells, and contains myofibrils.
Epimysium
Layer of skeletal muscle that surrounds the entire muscle, contains muscle fassicles and seperates the muscle from the surrounding tissue.
Muscle Fibers
Surrounded by the endomysium and contain myofibrils.
Skeletal Muscle
Surrounded by the epimysium
Muscle Fassicle
Surrounded by the perimysium
Myofibrils
Surrounded by the sarcoplasmic reticulum and consists of sarcomeres
isometric contraction
The muscle as a whole does not change length
Complete Tetanus
a higher stimulation frequency eliminates the relaxation phase completely for a short period of time
Troponin
acts as an anchor by binding to tropomyosin, G-actin and calcium ions
Thin filaments
composed primarily of actin
Thick filaments
composed primarily of myosin
Motor Unit
each motor neuron connects to several muscle fibers to form a
nebulin
holds F-actin strands together and found in thin filaments
Perimysium
layer that divides the skeletal muscle into a series of compartments and each contain muscle fibers called a fassicle.
twitch
one cycle of stimulus contraction relaxation in a muscle fiber.
concentric contraction
the muscle tension exceeds the resistance and the muscle shortens
essentric contraction
the peak tension developed is less than the load, and the muscle elongates owing to the contraction of another muscle or the pull gravity.
Muscle tone
the resting tension in a skeletal muscle.
Epimysium, Perimysium and Endomysium
the three connective tissue layers of the skeletal muscle
Skeletal, Cardiac and Smooth
the three types of muscles
Wave Summation
when a second stimulas arrives before the relaxation phase has ended
Treppe
when a skeletal muscle is stimulated a second time immediately after the relaxation phase.
Sarcomere Contraction
when thick and thin filaments slide against each other