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In the classification of joints, which of the following is true
All synovial joins are freely movable.
In skeletal muscle contraction, calcium apparently acts to
remove the blocking action of tropomyosin.
An elaborate network of membranes in skeletal muscle cells that functions in calcium storage is the
After nervous stimulation stops, ACh in the synaptic cleft is prevented from continuing stimulation of contraction by
acetylcholinesterase destroying the Ach
The structural theory that explains how a muscle fiber contracts is called the _____ _____ ______.
sliding filament theory
Electrical impulses reach the muscle cell's interior to alter the cell's chemical environment via what network?
The smallest functional unit is the what? Interactions between its thick and thin filaments are responsible for muscle contractions.
_______ is the neurotransmitter or chemical released by a motor neuron to communicate with other cells.
An _____ is a muscle whose contraction is chiefly responsible for producing a particular movement.
The origin of a particular skeleton muscle is defined as
the attachment site to the less moveable bone.
As ATP binds to the myosin head at the beginning of a muscle contraction cycle,
the mysosin head detaches from the actin
Place these structures of the skeletal muscle in order from largest to smallest
fascicle, muscle cell (fiber), myofibril, sarcomere, myofilament
The axon terminals of a nerve cell and the sarcolemma of a skeletal muscle join at the
The gap between the axon terminal of a motor neuron and the sarcolemma of a muscle cell is called the
Neurotransmitters are released upon stimulation from a nerve impulse by the
axon terminals of the motor neuron
While doing "jumping jacks" during an exercise class, your arms and legs move laterally away from the midline of your body. This motion is called
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