Term
1) body movement
2) maintenance of posture
3) protection and support
4) storage and movement of material
5) heat production |
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Definition
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Term
1) excitability--the ability of skeletal muscle cells to respond to stimulation by the nervous system.
2) conductivity--involves an electrical change that travels along the plasma membrane of the skeletal muscle cell.
3) contractility--exhibited when contractile proteins within the muscle cells slide past each other, causing the muscle to shorten.
4) elasticity--specialized protein fibers within the skeletal muscles cells act like compressed coils when a muscle contracts.
5) extensibility--the lengthening of a muscle cell. |
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Definition
| 5 Characteristics of Muscles |
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Definition
| The layer of dense irregular connective tissue that surrounds the whole skeletal muscle. |
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Definition
| The dense irregular connective tissue that surrounds fasicles. |
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Definition
| The innermost connective tissue layer. |
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Definition
| Bundles of muscle fibers. |
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Definition
| Muscle cells that run the entire length of the muscle. |
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Definition
| A thick, cord like structure that is composed of dense regular connective tissue. They attach the muscle to bone, skin, and other muscle. |
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Definition
| Connective tissue that forms a thin, flattened sheet of dense irregular tissue. |
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Definition
| A single motor neuron and the muscle fibers it controls. |
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Definition
| The cytoplasm of muscle fibers. |
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Definition
| The plasma membrane of a skeletal muscle fiber. |
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Definition
| Connective tissue that forms a thin, flattened sheet of dense irregular tissue. |
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Definition
| A single motor neuron and the muscle fibers it controls. |
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Definition
| The cytoplasm of muscle fibers. |
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Definition
| The plasma membrane of a skeletal muscle fiber. |
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Definition
| Deep invaginations of the sarcolemma that extend into the skeletal muscle fibers as a network of narrow membranous tubules. |
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Definition
| Similar to the ER of other cells. |
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Definition
| Located at either end of the sarcoplasmic reticulum. Much like the hem of a sleeve. Serve as the reservoirs for calcium ions. |
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Definition
| 80% of the muscle fiber is composed of these long, cylindrical structures. |
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Definition
| Each myofibril contains bundles of muscle protein called this. |
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Definition
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Definition
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Definition
| Associated with thin filaments. Short, thin, twisted, "string-like" protein. |
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Definition
| Associated with thin filaments. Globular or "ball like" protein attached to tropomyosin. Binding site for calcium ions. |
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Definition
| Myofilaments within myofibrils arranged in repeating microscopic cylindrical units. |
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Definition
| Bisected by Z discs. Disappear at full muscle contraction. |
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Definition
| Made up of thick filaments. Partially overlap. |
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Definition
| Most central portion of the A band in a resting sarcomere. Does not have thin filament overlap. Only thick filaments are present. Disappear during muscle contraction. |
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Definition
| Protein meshwork in the center of the H zone. Serves as the attachment site for the thick filaments. Keeps thick filaments in line while contraction and relaxation occur. |
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Definition
| Where the axon nears the sarcolemma of a muscle fiber, this part enlarges and flattens to cover a relatively large surface area. |
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Definition
| Located in the synaptic knob cytosol. Small membrane sacs filled with ACh. |
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Definition
| A narrow fluid filled space separating the synaptic knob and the motor end plate. The enzyme AChE resides there to break up ACh. |
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Definition
| The specialized region of the sarcolemma of a muscle fiber. It has numerous folds to increase surface area. Contain vast numbers of ACh receptors. |
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