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Muscular System A&P 1

Terminology
Horizontales
Thick protein in the center of the sarcomere; does not attach to the z-line
Surrounds the entire muscle
___ are the basic unit of contraction of a muscle cell
Finer protein fibers within a sarcomere; there are both thick and thin types
General term for connective tissue; separates, binds, and structures the body
Muscle cells can extend while relaxing and stretching or while generating force can lengthen
Each muscle fiber contains thousands of slender strands called ___
Fascia that extends from the superficial, surrounds muscle, as well as fasciculi and individual fibers
Surrounds each fiber and myofibril; is a system of interconnected hollow tubes
___ junction is where the nervous system communicates with the muscular system
Strip-like band of connective tissue, acts like bracelets and help stabilize tendons & keep them in place
Fascia located just beneath the skin
Cord that anchors muscles to bone
Center of a sarcomere; has no thin filaments
Contain thin filaments and z lines
Coils around actin and covers its binding sites
The glue or nails that keeps tropomyosin in place
Verticales
Transverse tubules that travel from the sarcoplasmic reticulum into the cell
The intercellular fluid within muscle fibers
When excited, muscle cells can contract to generate force
Thin fillement that contains binding cites for myosin heads
The covering of the muscle fiber or cell
The length of thick filaments; includes h zone
Folded sections of the sarcolemma or covering of a muscle fiber
___ Are also called Muscle cells
The neuron responsible for sending impulses which stimulate muscle fibers to contract
Muscle cells can become excited and respond to a stimulus; also called irritability
___ response is a principle which means that when a muscle fiber receives a stimulus it contracts to its fullest ability or not at all
A single motor neuron and all muscle fibers to which it attaches