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22 Cards in this Set
- Front
- Back
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An object is floating in water. If water is replaced by a denser fluid, what will happen to the density of the object?
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it will increase; as density increases, so does pressure; as pressure increases, volume decreases; since mass stays constant, as volume decreases, density must increase according to density = mass/volume
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Two objects lie in the same depth in water. What can be concluded about the two objects?
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they their densities are equal, not buoyont forces, are equal
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Are equilibrium and cell potential related?
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yes they depend on each other
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T/F: as temperature increases, so does the speed of sound
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true
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T/F: sound waves can travel in a vacuum
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false
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T/F: As a sound wave travels from one medium into another, it's frequency remains constant even if it's speed and wavelength change
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true
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Will sound travel faster in air or hydrogen gas?
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hydrogen gas since it is less dense
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T/F: heavier elements will scatter X rays more than lighter ones
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true
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Current flow from ____ to ____ voltage; electrons flow in the (same/opposite) direction as current.
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low to high voltage; opposite
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When Group II metals oxides react with water, they form:
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the corresponding hydroxides (strong bases)
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Which of the following is nonpolar?
a) SO2 b) BH3 c) CH3Cl |
b; BH3 is trigonal planar, which means it is symmetric and all it's dipoles will cancel; SO2 is slightly bent
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Which of the following will affect the molar solubility of CO2 gas in a reservoir?
a) pH of the water b) temperature of the water c) partial pressure of CO2 (g) |
all of them
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About what temperatures are needed to denature DNA? To kill bacteria?
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96C; 42C; thus, heating a bacteria to kill it will not necessarily denature its DNA, just inactivate it
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T/F: acquired immunity is permanent immunity
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false, it is temporary; a good example is vaccinations
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The interface between the axon and the myelin sheath is:
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the innermost part of an oligdendrocyte
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Increased protein catabolism can produce:
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weak muscles
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What is a paramecium?
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unicellular organism that uses aerobic respiration
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Cortisol is antagonistic to:
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insulin
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Reaction of an aldehyde with acidic water will form:
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a gem diol
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Hereditary spherocytosis is an autosomal dominant disease resulting from an abnormality in the RBC's cytoskeleton. What is the probability that a child born to a man with this disease and a normal woman will develop the disease?
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50%
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Where would you expect to find erythropoetin receptors?
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on the cell membranes of stem cells in the bone marrow
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Why does the brain use glucose rather than fatty acids as its major metabolic fuel during early stages of starvation?
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glucose can cross the blood-brain barrier via specific carrier molecules that fatty acids cannot
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