The minimum frequency of stimulation that can cause complete tetanus of muscle depends on []
A. stimulus intensity
B. threshold size
C. magnitude of muscle contractility
D. excitability of muscle
E. duration of single contractility
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The terminal cisterna of the sarcoplasmic reticulum of skeletal muscle can be stored []
A. Na+
B. K+
C. H+
D. Cl-
E. Ca2+
The initial length of the muscle is determined by []
A. Passive tension
B. Preload
C. Afterload
Difference between preload and afterload
E. Sum of preload and afterload
The role of the transverse tube in skeletal muscle cells is []
A. Reservoir of calcium ions
B. Channels of calcium ions into and out of muscle fibers
Channels of nutrients into and out of muscle cells
D. Passing excitement deep into muscle cells
E. Combining calcium and troponin
The enzyme that eliminates acetylcholine in the transmission of neuromuscular junction is []
A. Phosphodiesterase
B. Adenylate cyclase
C. ATPase
D. Cholinesterase
E. Carbonic anhydrase
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