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Muscular System
Question | Answer |
---|---|
The ability to shorten with force | Contractility |
The capacity of skeletal muscle to respond to a stimilus | Excitability |
The ability to be streched | Extensibility |
Ability to recoil to their orginal resting length after they have been streched | Elasticity |
Connective tissue sheath | Epimysium |
Another connective tissue located outside the epimysium, it surrounds and seperates muslces | Fascia |
A thread like structure that extends from one end of a fiber to another | Myofibrils |
Thin | Actin myofilaments |
Thick | Myosin myofilaments |
The basic structural and functional unit of the muscle | Sarcomeres |
What is on each side of the z-line? | A light band area called I band, it consists of actin |
extends the length of myosin, darker central region in each sacromere | A band |
Another area in the center of the sacromere, which consists of only myosin | H zone |
The myosin myofilaments are anchored in the center of the sacromere at a dark staining band called | The M line |
The charge difference across the membrane | Resting Membrane Potiential |
When a muscle cell is stimulated and the membrane charactristics change breifly | Action potential |
Nerve cells that carry action potientials to skeletal muscle fibers | Motor nuerons |
Formed by an enlarged nerve terminal resting in an indentation of the muscle cell membrane | Nueromascular junction |
Single motor nueron and all the skeletal muscle fibers it intevates is called? | Motor unit |
The enlarged nerve terminal | Presynaptic terminal |