The layer of the meninges in direct contact with the spinal cord is the
A) dura mater.
B) subarachnoid space.
C) arachnoid mater.
D) pia mater.
E) choroid plexus.
D
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Which of the following serve to increase the surface area of a cell for absorption and/or secretion?
A. Microvilli B. Cilia and microvilli C. Cilia and flagella D. Flagella E. Cilia
A floating embolus is a thrombus
Indicate whether the statement is true or false.
An abnormally high level of which of the following will result in goiter?
A) TRH B) either thyroxine or TRH C) TSH D) either TRH or TSH E) thyroxine
All of the following are true of the secondary response to antigen exposure except that it
A) depends on memory B cells. B) results in much higher antibody titers than in the primary response. C) results in much quicker rise in antibody titers. D) produces more IgG antibodies. E) weakens quickly because memory B cells only survive for a year or two.