During an isotonic contraction of a muscle in the arm
a. filaments do not shorten in the muscle.
b. movement does not occur.
c. the muscle does not change length.
d. the tension in the muscle does not overcome a load.
e. the tension in the muscle remains constant.
E
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Which three areas of gray matter found in each cerebral hemisphere are important in helping to control the initiation and termination of skeletal muscle movements?
a) red nuclei b) vestibular nuclei c) lateral olivary nuclei d) basal nuclei e) autonomic ganglia
The very brief moment following stimulation when a muscle remains unresponsive to additional stimulation is called the
A. relaxation B. contraction C. refractory period D. latent period
Following thyroid gland removal, individuals would need to take pharmacological levels of both thyroid hormone and calcitonin.
Answer the following statement true (T) or false (F)
The speed of contraction of skeletal muscle is related to:
A. the oxidative capacity of the skeletal muscle fiber B. the myosin ATPase activity of the skeletal muscle fiber C. the level of ?-adrenergic stimulation D. the rate of Ca++ extrusion from the skeletal muscle fiber E. the level of myosin light-chain phosphorylation within the muscle fiber