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