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In a resting muscle, the __________ contains a concentrated solution of calcium.
Motor nerve fibers release a neurotransmitter called ____, which make skeletal muscle fibers contract.
e tendency of a stretched muscle fiber to return to its original length is called ______.
One motor nerve fiber and all the muscle fibers innervated by it are called a _________ _______.
A plasma membrane is said to be ______________ if there is a difference in charge on opposite sides of it.
The ____________ ___________ theory is the current model of how a muscle fiber contracts.
A muscle fiber will not contract unless it is depolarized to a voltage called its __________.
A state of physiological inability to contract, even though the muscle may still be recieving stimuli is
A high energy molecule stored in muscles that transfers a phosphate group to ADP to form ATP after stored ATP is consumed is
During long periods of exercise, muscles consume ____________, ___________, _____________, ___________, _______________ and ___________________. This produces
1.glucose 2. glycogen 3.oxygen 4.pyrubic acid 5.fatty acids 6.amino acids
The amount of oxygen required after exercise to replenish stores of oxygen, ATP, creatine phosphate, and glucose is called
During the time that a muscle is shortening but maintaining constant tension it is undergoing _____________ contraction.
When there is not enough oxygen to create ATP by aerobic respiration, a muscle fiber can produce ATP by borrowing phosphate groups from
Regulatory proteins of the myofilaments are ____________________ and ___________________.
troponin and tropomysin
Contractile proteins of the myofilaments are _________________ and ___________________.
actin and myosin
Which of these processes occurs during the contraction of skeletal muscle?
Z discs move closer together
73. Which of the following is NOT found in the thin filaments of striated muscle?
A. F actin B. ATPase C. troponin D. tropomyosin E. Ca2+ receptors
80. After a muscle fiber has exhausted its stores of ATP and creatine phosphate, it switches to _______ as a source of energy.
A. glycolysis B. fat oxidation C. aerobic respiration D. anaerobic fermentation E. creatine kinase
What contraction is the force generated by the muscle does not change, but the muscle's length changes
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