The term "swollen glands" is usually meant to refer to lymph nodes in which
A. the valves of afferent vessels are bulging.
B. macrophages are clogging afferent lymphatic vessels.
C. lymphocytes are proliferating in germinal centers.
D. phagocytes are consuming the infected lymph nodes.
E. macrophages are entering at the hilum.
C
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Choose the correct statement regarding motor units.
A) Muscle fibers of each motor unit are not mingled with those of other motor units. B) During a sustained contraction, all motor units are activated simultaneously. C) A motor neuron may control only two or three muscle fibers of the eye muscle(s). D) When muscles contract for sustained periods, maximal tension is maintained. E) Most motor neurons control fewer than five muscle fibers.
Which functional group of muscles tends to oppose and slow the action of prime movers?
A. Fixators B. Agonists C. Synergists D. Antagonists
The spinal cord ends at the level of the
A. Sacrum. B. Fourth lumbar vertebra. C. Second lumbar vertebra. D. Twelfth thoracic vertebra.
Serum is essentially identical to plasma except for the absence of ________.
A. fibrinogen B. glucose C. nitrogenous wastes D. platelets E. albumin