The binding of ________ to a nicotinic receptor of a muscle fiber will ________ it
A) monoamine oxidase; inhibit
B) norepinephrine; excite
C) acetylcholine; inhibit
D) acetylcholine; excite
E) acetylcholinesterase; excite
D
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What can cause the depolarization at synapses?
a. activation of ionotropic glutamate receptors b. activation of voltage gated Na+ channels c. activation of ligand gated K+ channels d. release of Na+ ions from pre?synaptic membrane
A connective tissue is composed of cells and a(n) __________ that consists of fibers and ground substance.
Fill in the blank(s) with the appropriate word(s).
Isotopes have different numbers of ________; thus they also have different ________
A) protons; atomic numbers B) neutrons; atomic masses C) electrons; atomic numbers D) protons; atomic masses E) neutrons; atomic numbers
Which one of the following is continuous with the esophagus?
A) nasopharynx B) oropharynx C) linguopharynx D) laryngopharynx E) esophagopharynx