The arachnoid mater is
a. the innermost meningeal layer.
b. a delicate, richly vascularized meningeal layer that is "cobwebby" in appearance.
c. a tough, inelastic membrane that covers the central nervous system.
d. involved with the formation of cerebrospinal fluid.
e. more than one of these answers is correct.
B
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Define countercurrent multiplication as it occurs in the kidneys
A) The exchange of substances in the adjacent limbs of the nephron loop containing fluid moving in opposite directions. B) The exchange of substances in the adjacent limbs of the nephron loop containing fluid moving in the same directions. C) The cycling of urea from the collecting duct to the nephron loop and back. D) The bulk reabsorption of substances in the proximal convoluted tubule and the bulk movement of water due to osmosis. E) The secretion of ions in response to hormones in the distal convoluted tubule.
Golgi tendon organs respond in which of the following ways?
A. inhibit tension in the activated muscle B. initiate tension in the antagonist muscle C. both A and B D. none of the above
For the structures listed below, choose one of the following:
1. cerebral cortex 2. limbic system 3. corticospinal tracts 4. ventral horn 5. basal ganglia 6, corpus callosum A. structure is composed of gray matter B. structure is composed of white matter
What muscle underlies the posterior faucial pillars? (
What will be an ideal response?