The glial cell that provides structural support and organization to the CNS is the
A. astrocyte.
B. ependymal cell.
C. neurolemmocyte.
D. microglial cell.
E. oligodendrocyte.
A
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Physical evidence that supports the sliding filament theory of muscle contraction includes
A) constant distance between Z lines during contraction. B) decreased width of the H band during contraction. C) increased width of the I band during contraction. D) decreased width of the A band during contraction. E) the I band + H band distance is constant during contraction.
In ________, implantation occurs somewhere other than in the uterus
A) ectopic pregnancy B) hydramnios C) placenta previa D) abortion E) spontaneous abortion
If L = load, F = fulcrum, and E = effort, what type of lever system is described as LEF?
A) third-class lever B) second-class lever C) fourth-class lever D) first-class lever
Amylases, the enzymes used to digest carbohydrates, are secreted by
A) salivary glands into the mouth only. B) salivary glands into the mouth and the pancreas into the intestine. C) the pancreas into the intestine only. D) gastric glands into the stomach only. E) salivary glands into the mouth and gastric glands into the stomach.