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| A type of striated muscle attached to the skeleton and used to facilitate movement, by applying force to bones and joints via contractions. |
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| A type of involuntary, mononucleated, or uninucleated, striated muscle found exclusively within the heart. |
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| A type of non-striated muscle found within the "walls" of hollow organs. |
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| A thin polarized membrane enclosing a striated muscle fiber. |
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| The fine connective tissue sheath surrounding a muscle fiber. |
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| A motor neuron and all of the corresponding muscle fibers it innervates. |
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| A type of muscle contraction in which the muscle applies accelerating force to overcome the resistance. The length of the muscle shortens as force is produced. |
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| A type of mucle contraction in which the resistance is greater than the force applied by the muscle so that the muscle lengthens as it produces force. |
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| A contraction in which muscle tension is increased, but the muscle is not shortened because the resistance cannot be overcome. There is no change in muscle length or joint angle. |
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| A large-diameter muscle fiber characterized by a reliance on the glycolytic pathways. This fiber type is quick to fatigue but is capable of high power outputs. |
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| An intermediate-diameter muscle fiber characterized by aerobic and anerobic metabolism. |
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| A small-diameter muscle fiber characterized by aerobic metabolism and lower maxium tension. This fiber type is fatigue resistant and highly oxidative. |
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| The oxygen-transporting protein of muscle, resembling blood hemoglobin in function. |
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| Tiny blood vessels called _____network throughout the body, passing oxygen and nutrients into tissue cells. |
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| is a protein complex found in both skeletal muscle and cardiac muscle that relays calcium sensitivity to muscle cells. |
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| binds to molecules of actin and troponin to regulate the interaction of actin and myosin. |
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| Adenosine triphosphate (ATP) |
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Definition
| is used to fuel mechanical work. |
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| Specialized muscle structures called ________innervated by both sensory and motor neuron axons, functioning to send proprioceptive information about the muscle to the central nervous system, in response to muscle tissue lenght. |
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| Kinesthetic receptors called__________are situated near the junction of muscle fibers and a tendon and act as muscle-tension regulators. |
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| T/F? Fast twitch muscle fibers preferentially function using the anaerobic metabolic systems, while slow twitch muscle fibers are more efficient in the aerobic metabolic system. |
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| T/F? Information regarding recruitment and fiber characteristics is not relevant when creating the exercise prescription. |
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Definition
Which of the following muscle types maintains the highest concentration of mitochondria?
A. Smooth Muscle
B. skeletal Muscle
C. Cardiac Muscle
D. All of the above |
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Definition
Exercise-related fatigue may occur in ________ compromising performance.
A. the central nervous system
B. The peripheral nervous system
C. the muscle fiber
D. All of the above
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Definition
What type of muscle contraction is commonly used for stabilization and is characterized by no change in the joint angle?
A. Isometric contraction
B. Eccentric contraction
C. Concentric contraction
D. All of the above
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Definition
Which of the following is a kinesthetic receptor situated near the junction of muscle fibers and a tendon which serve as muscle-tendon regulators?
A. mitochondria
B. sarcolemma
C. Muscle spindles
D. golgi tendon organs
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Definition
Which muscle fiber type would be the most predominant contributor to performance for an endurance athlete?
A. Type I fibers
B. Type IIa fibers
C. Type IIb fibers
D. None of the above |
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