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35 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Functions of Skeletal Muscle |
*Movement *Maintain Posture *Heat Production |
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Point of attachment on a Fixed Bone. |
Origin |
Characteristics of a Muscle |
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Point of attachment on the bone that moves. |
Insertion |
Characteristics of a Muscle |
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The movement that occurs when the muscle contracts.
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Action
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Characteristics of a Muscle
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Main muscle of a particular movement.
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Prime Movers (Agonists)
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Group Actions
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Help or Enhance the movement of the Prime Mover. |
Synergists |
Group Actions |
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Opposes the movement of the prime mover.
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Anatagonists
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Group Actions
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Anterior Muscles
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Flexors (opposite for knees and the toes)
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Generalizations about locations
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Posterior Muscles
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Extensors (opposite for knees and the toes)
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Generalizations about locations
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Medial Muscles
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Adductors
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Generalizations about locations
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Lateral Muscles
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Abductors
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Generalizations about locations
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Organization of Muscle Fibers into muscle
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Myofibrils → Muscle Fiber → Fascicle → Whole Muscle
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Gross Anatomy of Skeletal Muscle
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3 Types of Connective Tissue Coverings |
*Epimysium *Perimysium *Endomysium |
Gross Anatomy of Skeletal Muscle |
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2 Types of the Microscopic Anatomy of Skeletal Muscle |
*Muscle Fibers *Myofibrils |
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3 Types of Muscle Fibers |
*Sarcolemma *Sarcoplasmic Reticulum *Sarcoplasm |
Microscopic Anatomy of Skeletal Muscle |
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The Plasma Membrane of a Muscle Cell. |
Sarcolemma |
Muscle Fibers |
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Stores Calcium |
Sarcoplasmic Reticulum |
Muscle Fibers |
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The Cytoplasm of a Muscle Cell |
Sarcoplasm |
Muscle Fibers |
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Rod like Filaments found within a Muscle Fiber; the number of _________ determines thediameter of the Muscle Fiber. |
Myofibrils |
Microscopic Anatomy of Skeletal Muscle |
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Single contractile unit of a muscle. |
Sarcomere |
Myofibrils |
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Types of Sarcomere |
*A Band *I Band *M Line *H Zone |
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Types of Nerve supply |
*Motor Neurons *Motor Unit *Neuromuscular Junction *Acetylcholine |
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A Nerve Cell that sends messages from the Central Nervous System (CNS) to a muscle or gland. |
Motor Neurons |
Types of Nerve Supply |
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A Motor Neuron and all the Muscle Fibers it Innervates. |
Motor Unit |
Types of Nerve Supply |
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Synapse between the Muscle and Motor Neuron. |
Neuromuscular (Myoneural) Junction |
Types of Nerve Supply |
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Neurotransmitter released by the Motor Neuron. |
Acetylcholine |
Types of Nerve Supply |
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Step 1: How the Muscle receives the Neuron |
Acetylcholine (Ach) is released from the Synaptic End Bulb of the Motor Neuron. |
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Step 2: How the Muscle receives the Neuron |
Ach binds to the Receptors on the Motor End Plate; causing Na+ Channels to open. |
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Step 3: How the Muscle receives the Neuron |
Na+ diffuses into the cell causing an action potential to occur along the Sarcolemma and through the Tubules. |
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Step 4: How the Muscle receives the Neuron |
Ach is rapidly broken by Acetylcholine. |
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Step 1: Sliding Filament Theory of Muscle Contraction |
ATP is hydrolyzed into ADP + P. |
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Step 2: Sliding Filament Theory of Muscle Contraction |
The energized Myosin heads bind to the Myosin binding site on the Actin and release the Phosphate Group. Cross Bridges are formed. |
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Step 3: Sliding Filament Theory of Muscle Contraction |
Power stroke occurs - the Myosin heads swivel towards the center of the Sarcomere, pulling the Myofilaments towards the center of the Sarcomere. ADP is released. |
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Step 4: Sliding Filament Theory of Muscle Contraction |
A new molecule of ATP attaches to the Myosin heads and the Myosin detaches from the Actin. |
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The 3 Sources of ATP |
*Creatinine Phosphate *Anaerobic Respiration *Aerobic Cellular Respiration |
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