The structural explanation of how a muscle fiber contracts is called the
A) myosin spiral theory.
B) thin filament theory.
C) sliding filament theory.
D) cross-bridge connection.
E) active site rule.
Answer: C
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A. Pollicis B. Hallucis C. Lumbrical D. Peroneus E. Indicis
The internal intercostal muscles are inspiratory muscles because they lift the ribs upward and outward to enlarge the thoracic cavity
Indicate whether the statement is true or false
A drug called a "monoamine-oxide inhibitor" might be expected to cause
A) increased levels of norepinephrine at a synapse. B) decreased levels of acetylcholine at a synapse. C) presynaptic inhibition. D) increased permeability to calcium.
A movement away from the midline of the body is termed
A) inversion. B) abduction. C) adduction. D) flexion. E) extension.