A threshold stimulus applied to an excitable membrane is one that is just sufficient to:
A. trigger an excitatory postsynaptic potential.
B. cause a change in membrane potential.
C. trigger an action potential.
D. be conducted to the axon hillock.
E. depolarize a dendrite.
C
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Which structure is an eccrine sweat gland?
a) A b) F c) G d) H e) I
An area of the retina that contains only cones and is the site of sharpest vision is the
A) outer segment. B) inner segment. C) fovea. D) optic disc. E) tapetum lucidum.
If the ground substance of a connective tissue were thinner than normal, one could reasonably suspect that the fibroblasts were not secreting enough ________.
Fill in the blank(s) with the appropriate word(s).
What structure does cerebrospinal fluid flow through as it passes from the third to the fourth ventricle?
A. Cerebral aqueduct B. Corpus callosum C. Dural sinus D. Interventricular foramen E. Central canal