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Medical College Admissions Test Latest Update Actual Exam from Credible Sources with Questions and Verified Correct Answers Golden Ticket to Guaranteed A+ Verified by Professor
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  • 10 de octubre de 2024
  • 6
  • 2024/2025
  • Examen
  • Preguntas y respuestas

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  • medical college admissions test latest update 2024

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  • Medical College Admissions
  • Medical College Admissions

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Medical College Admissions Test Latest Update
2024-2025 Actual Exam from Credible Sources
with Questions and Verified Correct Answers
Golden Ticket to Guaranteed A+ Verified by
Professor

Action potentials travel down neural axons that resist the flow of current. In considering
a theoretical circuit, one normally assumes that the wire has no resistivity. In the real
world, however, wire resistivity is an important consideration. Which of the following is a
way to increase resistance?


A) Lengthen the wire
B) Widen the wire
C) Lower the temperature
D) Change from tungsten to copper wire - CORRECT ANSWER: A
This question tests your knowledge of resistance in wires. An electrical wire's resistance
is directly proportional to its length and inversely proportional to its cross-sectional area.
Think of it as gravel in a pipe—the wider the pipe and the shorter the pipe, the easier it
is for water to go through it.


B is incorrect because when a wire's cross-sectional area is increased, its resistivity is
decreased.


C is incorrect because lowering temperature decreases resistivity. Think
superconductors.


D is incorrect because tungsten has higher resistivity than copper. Tungsten is used for
lightbulb filaments because of its higher resistivity.


Chemical extraction is a simple, but powerful, means of isolating a desired compound,
and this technique is used to isolate many pharmacological agents. A chemist requires

, that a mixture of two species be separated. In order to do this, the chemist allows the
mixture to separate and extracts the top, non-polar layer. Based on this information,
what is least likely to be true of the original two species?


A) The densities of the species are different.
B) The original species rotate plane-polarized light in opposite directions.
C) The bottom layer is hydrophobic.
D) The two species have the same molecular weight. - CORRECT ANSWER: B
describes the species as enantiomers. If the two species can be separated through
ordinary means, without first changing them chemically, they cannot be enantiomers!
Enantiomers cannot be separated by physical properties alone.


Ideal gasses are useful for calculations, but perfectly "ideal" gasses do not exist in the
real world. Under what conditions does a real gas differ in behavior from an ideal gas?


A) increased pressure only
B) increased temperature only
C) increased pressure and decreased temperature
D) only when the molar volume is very large - CORRECT ANSWER: C


Real gases deviate from the ideal gas law due to elevated pressures and decreased
temperatures. This is because as pressure increases, the molecules are forced closer
together, so intermolecular interactions become important. When the molecules are far
apart, the intermolecular forces are minimal. As temperature decreases, gas particles
move more slowly, so as they pass each other, the period of time in which they are in
close proximity increases. This allows more opportunities for the molecules to affect one
another. Hence, deviations from ideal conditions result.


Most of the CO2 in the blood travels as HCO3- and H+ ions in the plasma. Which of the
following would a physician most likely find upon examining a person who has recently
had Acute Mountain Sickness (Altitude Sickness)?


A) Increased levels of O2 in the plasma

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