If the pathway shown in the diagram is a sympathetic division pathway, which neurotransmitter acts at the effector?
a) Norepinephrine
b) Acetylcholine
c) Epinephrine
d) Dopamine
e) Serotonin
a
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Air entering the body is filtered, warmed, and humidified by the
A) lungs. B) alveoli. C) upper respiratory tract. D) lower respiratory tract. E) All of the answers are correct.
A condition of blue discoloration is:
A) cyanosis B) albinism C) errythema D) jaundice
In order for an action potential to occur, a certain membrane potential called the ________ must be reached.
A. depolarization B. sodium-potassium pump C. threshold D. hyperpolarization
Which of the following is NOT true of enzymes?
A. They are catalysts that increase the rate of a reaction. B. One enzyme can have many reactions. C. The active site has a specific shape to match the reactant(s). D. A slight change in shape can effect function. E. They may need a cofactor to be functional.