Which neurotransmitter substance has been implicated in Parkinson's disease?
A. norepinephrine
B. dopamine
C. serotonin
D. GABA
E. acetylcholine
B
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The difference in electrical charge between the inside and outside of a polarized neuron cell membrane is called the ________ ________.
Fill in the blank(s) with the appropriate word(s).
Blood is a ________.
A) colloid B) homogeneous compound C) heterogeneous compound D) suspension
Electrolytes are substances that
A. are NOT found in the human body in any appreciable amounts. B. form covalent bonds with water. C. cannot conduct electricity in solution. D. are NOT charged particles. E. conduct electricity when dissolved in water.
The minimum amount of energy that reactants must have to start a chemical reaction is called
A. potential energy. B. mechanical energy. C. kinetic energy. D. activation energy. E. electromagnetic energy.