Which is an accurate description of appositional bone growth?
A. Osteoblasts build bone at the circumferential lamellae while osteoclasts widen the medullary cavity.
B. Osteoclasts build bone at the concentric lamellae while osteoblasts build bone at the interstitial lamellae.
C. Osteoblasts build bone at the concentric lamellae while osteoclasts build bone at the epiphyses.
D. Osteocytes build bone at the interstitial lamellae while osteoclasts expand the length of the medullary cavity.
E. Osteocytes and osteoclasts expand the bone at its epiphyses, chondrocytes construct cartilage.
A. Osteoblasts build bone at the circumferential lamellae while osteoclasts widen the medullary cavity.
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Which of the following is not a safety issue associated with MRI?
A. The presence of ferromagnetic objects in the body B. An increase in body temperature C. Loud noises emitted by the scanner D. Reactions to contrast agents E. None of the above
Identify the structure that contains the preganglionic nerve fibers of the olfactory nerve.
-cribriform plate of ethmoid bone -olfactory bulb -olfactory epithelium -frontal sinus
Which cell combats virally infected cells, transplants, and cancer cells?
A. Monocytes B. NK cells C. B lymphocyte D. T lymphocyte
Which of the following describes how a presynaptic neuron would communicate a strong signal to a postsynaptic neuron?
A. Changing the destination of the action potentials B. Changing the direction the action potentials are traveling down its conductive segment C. Increasing the frequency of its action potentials D. Increasing the magnitude (voltage change) of each action potential