The glossy-white appearance of most axons is due to
A. the white color of the perivascular feet.
B. their proximity to white bone.
C. the covering of ependymal cells.
D. their proximity to light-reflecting cartilage.
E. the high lipid content of the myelin sheath.
Answer: E
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The phase of mitosis that begins as spindle fibers pull sister chromatids apart at the centromere is
A. metaphase. B. anaphase. C. telophase. D. prophase. E. interphase.
Which of the following structures is NOT part of the upper respiratory system?
a) Nasal cavity b) Trachea c) Larynx d) Pharynx
In an acidic solution, ________.
A. the OH- ion concentration is greater than the H+ ion concentration B. the H+ ion concentration is less than the OH- ion concentration only if the solution is buffered C. the H+ ion concentration is equal to the OH- ion concentration D. the OH- ion concentration is less than the H+ ion concentration
What does "A" represent on the diagram of the skull and brain?
A. subarachnoid space B. dural venous sinus C. pia mater D. arachnoid mater E. subdural space