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22 Cards in this Set

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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?
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
Two objects lie in the same depth in water. What can be concluded about the two objects?
they their densities are equal, not buoyont forces, are equal
Are equilibrium and cell potential related?
yes they depend on each other
T/F: as temperature increases, so does the speed of sound
true
T/F: sound waves can travel in a vacuum
false
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
true
Will sound travel faster in air or hydrogen gas?
hydrogen gas since it is less dense
T/F: heavier elements will scatter X rays more than lighter ones
true
Current flow from ____ to ____ voltage; electrons flow in the (same/opposite) direction as current.
low to high voltage; opposite
When Group II metals oxides react with water, they form:
the corresponding hydroxides (strong bases)
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
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
About what temperatures are needed to denature DNA? To kill bacteria?
96C; 42C; thus, heating a bacteria to kill it will not necessarily denature its DNA, just inactivate it
T/F: acquired immunity is permanent immunity
false, it is temporary; a good example is vaccinations
The interface between the axon and the myelin sheath is:
the innermost part of an oligdendrocyte
Increased protein catabolism can produce:
weak muscles
What is a paramecium?
unicellular organism that uses aerobic respiration
Cortisol is antagonistic to:
insulin
Reaction of an aldehyde with acidic water will form:
a gem diol
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?
50%
Where would you expect to find erythropoetin receptors?
on the cell membranes of stem cells in the bone marrow
Why does the brain use glucose rather than fatty acids as its major metabolic fuel during early stages of starvation?
glucose can cross the blood-brain barrier via specific carrier molecules that fatty acids cannot