What gives bone its compressional strength?
A. Inorganic salts
B. Red bone marrow
C. Reticular fibers
D. Endosteum
E. Yellow bone marrow
Answer: A
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Which of the labeled cells in the figure is NOT a neuroglial cell?
a) A b) B c) C d) D e) F
The sympathetic preganglionic neuron cell bodies are housed in the _______ horn of the appropriate thoracolumbar regions of the spinal cord
Fill in the blank with correct word.
Which of the following is incorrect if blood flow to an area of the lungs is reduced while airflow remains normal?
a. The concentration of CO2 in this area decreases. b. The change in CO2 concentration causes smooth muscles of the local airways to relax. c. The change in CO2 concentration leads to increased resistance of local airways. d. The change in O2 concentration leads to dilation of local blood vessels. e. The change in O2 concentration leads to decreased vascular resistance.
A reason that the axons in the CNS and PNS differ in their ability to regenerate after injury is that
A. axons of the CNS lack myelin. B. axons of the CNS lack neurilemmae. C. peripheral nerves lack endoneurium. D. peripheral nerves lack Schwann cells.