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Muscle Tissue Proper

Muscle tissue properties

4 muslce tissue Properties Excitability Extensibility Contractility Elasticity *All of these properties allow a muscle to produce forcer over and over
Excitability (Irritability) Sensitivity to chemical, electrical, or mechanical stimuli
Contractility Ability to Contract and develop Tension or Internal F against resistance when stimulated
Extensibility Ability to be passively stretched beyond its normal resting length.
Elasticity Ability of muscle to return to its original length following stretching
Intrinsic Ex- Brachialis Contained wholly within the organ on which it acts Origin and Insertion are contained within the two body parts
Extrinsic Ex-Biceps Brachii Muscle originates outside of body part upon which it acts Origin and insertion are not necessarily in btwn the two bones it's acting on
Action Ex- Biceps Brachii has the action of flexion at elbow Specific mvmnt of joint resulting from concentric contraction Usually cause by a group of muscles working together *A muscle may cause more thatn one action at the same join or at a different joing
Innervation segment of the nervous system responsible for providing stimulus to muscle fibers within specific portion of muscle *A muscle may be innervated by more than one nerve and one nerve may innervate more than one muscle
Amplitude range of muscle fiber length between max & min lengthening
Gaster Contractile portion of muscle
Tendon Fibrous connective tissue, connects muscles to bones, connects muscles to other structures
Two muscles may share a tendon Gastrochnemius and Soleus share the Achilles tendon
A muscle may have multiple tendons connecting it to one or more bones Three proximal attachments of triceps brachii. Allows muscles to diversify their actions by connecting to different heads.
Origin Where the muscle starts Structurally- most proximal attachment of muscle Functionally- least movable part of muscle
Insertion Where the muscle ends Structurally- the most distal attachment of muscle Functionally- Most moveable part of the muscle
Created by: jmgibson1