The intensity of an electrical impulse is reflected in the
a. frequency of action potentials.
b. magnitude of action potentials.
c. duration of action potentials.
d. intensity of action potentials.
e. the frequency and duration of action potentials.
A
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Which of the following DOES NOT correctly complete this statement: The MHC (major histocompatibility complex) is important in
A. distinguishing self from non-self. B. recognizing infected cells. C. identifying bacterial pathogens. D. identifying abnormal cells. E. presenting antigenic determinants.
According to the theory of island biogeography, a species has the highest chance of being lost from an island that is
A) small and close to the mainland B) large and remote C) small and remote D) large and close to the mainland E) Either B or C
What scientist(s) first demonstrated in the laboratory that organic compounds could be synthesized in an abiotic environment?
a) Rosalind Franklin b) Haldane and Oparin c) Urey and Miller d) Watson and Crick e) Anton Van Lueenhoech
Water moves out of filtrate in the nephron tubule into the interstitial fluid by
A) filtration. B) excretion. C) secretion. D) osmosis.