Which of the following is NOT true about astrocytes?
A. They can prevent toxic substances from entering brain tissue.
B. They can wall off an injury site to prevent spread of inflammation.
C. They can aid in the regeneration of injured neurons.
D. They can release chemicals that promote formation of synapses.
Answer: C
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Which of the following is formed from mesoderm?
A. autonomic neurons B. dermis of the skin C. adrenal medulla D. teeth E. tonsils
All of the following are symptoms of Cushing's syndrome EXCEPT ________.
A. upper body obesity B. round face C. easy bruising D. hypoglycemia
Leon has gallstones. His doctor puts him on a diet low in fat. Why?
Which of the following is not true of endothelium?
A. It is avascular. B. It secretes substances. C. It consists of a single layer of cells. D. It allows for rapid diffusion of substances. E. It contains a sheet of collagen fibers.