What major function occurs on the specific membranes indicated by A?
A)synthesis of proteins
B)replication of DNA
C)production of most of the cell's ATP
D)digestion of ingested food
A)synthesis of proteins
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The action potentials from the sympathetic neurons ________, while the action potentials from the parasympathetic neurons ________.
A. increase heart rate and contraction strength; decrease heart rate and contraction strength B. increase heart rate and contraction strength; decrease heart rate but do not affect heart contraction strength C. decrease heart contraction and contraction strength; increase heart rate and contraction strength D. increase heart rate but do not affect heart contraction strength; decrease heart rate but do not affect heart contraction strength
Which of the following statements is correct concerning the variation of voltage-gated ion channels?
A) Na+ channels have much greater diversity than K+ channels. B) Typically, a more complex nervous system also contains a greater diversity of channels. C) There is a great diversity of channels, but within a single organism, only one isoform of a channel can exist. D) There is a large diversity of channels, but they show no physiological significance.
A sustained muscle contraction is known as ________.
A. treppe B. tone C. paralysis D. twitch E. tetanus
________ are immature erythrocytes that are present in the circulation
A) Erythroblasts B) Normoblasts C) Myeloblasts D) Band cells E) Reticulocytes