Kaplan MCAT #5
Terms
undefined, object
copy deck
- 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