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The connective tissue covering that encloses the sarcolemma of an individual muscle fiber is called
The function of T tubules in muscle contraction is to
transmit the action potential deep into the muscle cells
The sites where the motor nerve impulse is transmitted from the nerve endings to the skeletal muscle cell membranes are the
A smooth, sustained contraction resulting from very rapid stimulation of the muscle, in which no evidence of relaxation is seen is called
During muscle contraction, ATP is provided by
A) a coupled reaction of creatine phosphate with ADP, B) aerobic desperation of glucose, and C) anaerobic glycolysis
Which does (do) not require that oxygen be available?
A) a coupled reaction of creatine phosphate with ADP) & C) Aneaerobic glycolysis
Myoglobin has a special function in muscle tissue, it
holds a reserve supply of oxygen in the muscle
Aerobic exercise results in all of the following except
increased size and strength of existing muscle cells
Name and describe the 4 special functional abilities of muscle that are the basis for muscle response
Excitability; ability to receive and respond to a stimulus on the inside or outside of the body. Contractility; ability to shorten forcibly when adequelty stimulated. Extensibility; ability to be stretched or extended. Elasticity; ability to recoil and resume its resting length after being stretched.
Distinguish between direct and indirect muscle attachments and tendon and an aponeurosis
In direct or (FLESHY) attachment the epimysium of the muscle is fused to the periosteum of a bone or perichondrium of cartilage. In indirect attachments the muscles connective tissue wrappings extend beyond the muscle as either a rope like tendon or as a sheet like aponeurosis. A tendon is rope like and aponeurosis sheet like.
Describe the structure of a sarcomere and indicate the relationship of the sacromere to myofilaments.
A sarcomere is a segment of a myofibril containing thick and thin filaments. Sarcomere is the contractile unit, composed of myofilaments.
Explain the sliding filament theory of contraction
States that during contraction the thin filaments slide past the thick ones so that actin and myosin filaments overlap to a greater degree. In a relaxed muscle fiber the thick and thin filaments overlap only at the ends of the A band.
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