The brief period of time between the beginning of the action potential in the muscle and the beginning of contraction is referred to as the
A) repolarization period.
B) latent period.
C) relaxation phase.
D) refractory period.
E) depolarization period.
B) latent period.
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Which structure is not a motor center?
a. postcentral gyrus b. thalamus c. caudate nucleus d. red nucleus
fasciae separate muscles into functional groups. which term refers to these enclosed groups of muscles?
a) fixators b) compartments c) antagonists d) aponeuroses
Normal expirations are brought on by
a. contraction of the external intercostals. b. contraction of the internal intercostals. c. contraction of the diaphragm. d. elastic recoil of inspiratory muscles. e. elastic recoil of expiratory muscles.
Blood returning to the heart from the systemic circuit first enters the
A) right atrium. B) right ventricle. C) left atrium. D) left ventricle. E) conus arteriosus.