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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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.
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