The difference in hydrogen ion concentration between solutions with pH 4 and pH 5 is

A) twentyfold. B) fivefold. C) tenfold. D) twofold.


C

Anatomy & Physiology

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What specific structural characteristic makes voluntary control of urination possible? 26

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If you surveyed a population of cells, in which phase would most cells likely be?

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Which of the following hormones increase(s) in concentration in the plasma during exercise?

A) insulin B) cortisol and catecholamines C) cortisol D) catecholamines E) cortisol, catecholamines, and insulin

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Action potentials result from

A) closing of ion channels. B) opening of calcium gates. C) neurons transporting neurotransmitters. D) abrupt changing of the transmembrane potential. E) All of the answers are correct.

Anatomy & Physiology