What difference in axonal signaling determines whether we experience a mild or a strong sensation?

A. Action potential threshold
B. Conduction speed
C. Amount of neurotransmitter released per vesicle
D. Frequency of action potentials
E. Amplitude of action potentials


Answer: D

Biology & Microbiology

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Sodium chloride (NaCl) in water can be described by

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Which of the following is most inclusive?

a. family b. phylum c. species d. class e. order

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Which of the following pairs of protists and their characteristics is mismatched?

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Which of the following best illustrates the first law of thermodynamics by Niagara Falls?

a. Water at the top of the falls has high kinetic energy; as the water moves over the waterfall, its kinetic energy is converted into potential energy; when the water reaches the bottom of the waterfall, its potential energy is transformed into other types of energy: heat, sound, and mechanical energy. b. Water at the top of the falls has high potential energy; as the water moves over the waterfall, its potential energy is converted into kinetic energy; when the water reaches the bottom of the waterfall, its kinetic energy is transformed into other types of energy: heat, sound, and mechanical energy. c. Water at the top of the falls has high potential energy; as the water moves over the waterfall, its potential energy is converted into kinetic energy; when the water reaches the bottom of the waterfall, its kinetic energy is transformed into potential energy again. d. Water at the top of the falls has high potential energy; as the water moves over the waterfall, its potential energy is converted into kinetic energy; when the water reaches the bottom of the waterfall, its kinetic energy is lost.

Biology & Microbiology