Describe in detail the events at the neuromuscular junction and how these events allow for the excitation-contraction coupling event to occur.  Be sure to also include in detail all the steps at the NMJ and the steps of the excitation-contraction coupling event, including the cross bridge cycle.

Explain the meaning of a sarcomere and its parts. Compare the contracted and relaxed sarcomere by writing the mechanisms that lead to contraction and relaxation. Describe the Sliding Filament Model of Muscle Contraction. Discuss the All or None Law of Muscle contraction.

The following is an oscilloscope tracing displaying the muscle twitch of an intact, viable frog skeletal muscle. The muscle was stimulated via electrodes placed on the muscle at time zero and again at 75 msec. Which of the following physiological phenomena does this demonstrate? Force 0 20 treppe fatigue fused tetanus wave summation 120 Time (msec) 2015 a 180 200

Differentiate between isovolumetric contraction phase and isovolumetric relaxation phase

When utilizing microprocessor technology for testing muscle strength, you are typically looking at what form of muscle contraction?     Concentric   Isokinetic   Isometric   Eccentric

Sketch the overlapping pattern of myofilaments to show howthey account for the A bands, I bands, H bands, and Z discs

Describe how each of the following factors influences motor unit recruitment: a) Increasing contraction speed b) Increasing force output c) Increasing fatigue

Why is the increase in velocity inversely proportional to the sarcomere length?

Electrical stimulation of skeletal muscle at 5Hz results in a single muscle twitch. Define the stages and stimulation rates required to achieve a fused tetanus.

Which of the following is a correct sequence (in chronological order of occurrence) within excitation-contraction coupling? a. Synpatic vesicles fuse with the pre-synaptic membrane, Neurotransmitter binds to receptors in the post-synaptic membrane, Neurotransmitter diffuses across the synaptic cleft   b. Neurotransmitter binds to receptors in the post-synaptic membrane, Synpatic vesicles fuse with the pre-synaptic membrane, Neurotransmitter diffuses across the synaptic cleft   c. Synpatic vesicles fuse with the pre-synaptic membrane, Neurotransmitter diffuses across the synaptic cleft, Neurotransmitter binds to receptors in the post-synaptic membrane