What directly determines an atom's identity?
A. the number of electrons
B. the number of neutrons
C. the number of protons
D. the number of bonds it can form
E. the ratio of protons to electrons
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Question 2) Which is a covalent bond?
A. two atoms share inner-orbit electrons with each other
B. a bond between water molecules
C. a bond between two oppositely charged ions
D. a bond between two free radicals
E. two atoms share outer orbit electrons with each other
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Question 3) Carbon-12 and carbon-14 are isotopes. How are they different from each other?
A. different numbers of protons
B. different numbers of neutrons
C. different numbers of electrons
D. they can form different numbers of chemical bonds
E. different number of energy shells
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Question 4) Which correctly describes the structure of an atom?
A. There are always the same number of protons and neutrons.
B. There are always the same number of protons and electrons.
C. There are always the same number of neutrons and electrons.
D. The number of protons, neutrons, and electrons is always the same
E. There are never the same number of neutrons and protons.
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Question 5) Which equation is most accurate?
A. extracellular fluid volume + interstitial fluid volume = whole body fluid volume
B. intracellular fluid volume + interstitial fluid volume = extracellular fluid volume
C. extracellular fluid volume - interstitial fluid volume = plasma volume
D. plasma volume + intracellular fluid volume = extracellular fluid volume
E. total body fluid volume - intracellular fluid volume = interstitial fluid volume
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Question 6) An experimental subject is isolated in an underground room with no windows, no clocks, and no contact with the outside world. Researchers monitoring his behavior observe that he eats breakfast a little bit later each day.
What term best describes the subject's biological activity?
A. circadian rhythm
B. free-running rhythm
C. jet lag
D. phase shift
E. entrainment
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Question 7) ______________ is term describing regulation of cellular activity by chemical mediators produced by that same cell.
Fill in the blank(s) with the appropriate word(s).
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Question 8) _______________ regulation describes regulation of cellular activity by messengers from nearby cells.
Fill in the blank(s) with the appropriate word(s).
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Question 9) _________________ is the general term for a chemical released by axon terminals into the bloodstream.
Fill in the blank(s) with the appropriate word(s).
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Question 10) ________________ is the general term for a chemical released by axon terminals into a synaptic cleft.
Fill in the blank(s) with the appropriate word(s).
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