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Tns final 100- VERIFIED SOLUTIONS, SCORED A+.pdf

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Tns final 100- VERIFIED SOLUTIONS, SCORED A+.pdf

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Tns final 100% VERIFIED SOLUTIONS,
SCORED A+



neurons integrate .and .broadcast .information

electrophys can .measure .the .resting .membrane .potential .of .a .neuron

higher .inside potassium

higher .outside sodium, .chloride, .calcium

mri electromagnet, .usually .superconducting

radiofrequency various .transmit .and .receive .antennae

field .lines mri .magnet .concentrates ._ .through .bore

field .strength higher ._ .in .mri .leads .to .better .images

echo of .transmitted .signal .is .received .and .analyzed .to .generate .an .image

magnetic .field as .protons .rotate .they .generate .a .tiny ._ ._

external .field application .of ._(B0) .aligns .protons .parallel .and .antiparallel .to
.B0


parallel slightly .more .protons .align ._ .than .anti_

generated .and .measured 4 .millionths .of .a .percent .more .in .parallel .than
.antiparallel. .enough .for .signal .to .be ._


magnetic .field with .the .application .of .a ._ .protons .fall .in .line

applied protons .precess .about .an .axis .in .an ._ .megnetic .field

external frequency .of .precession .depends .on ._ .field .strength .B0 .and .the
.type .of .atom


RF .EMR radio .transmitter .sends .a .pulse .of ._ ._ .into .the .tissue .at .a .specific
.frequency


absorb protons .precessing .at .the .emitted .frequency ._ .that .energy .and .flip
.(90 .or .180 .degrees .usually)

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