| Question | Answer |
| 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 |
