Science cannot yet describe "thinking" in physical terms.However,we know that it involves metabolism within brain cells.With positron emission tomography (PET)scan or activity nuclear magnetic resonance (NMR)it is possible to image the regions of the brain that are most metabolically active during various mental activities.For different mental functions,different regions and nerve cells become active.However,
A)the cellular energy expended in "thinking" must be less than the chemical bond energy supplied in food to these brain cells.
B)"thought" cannot be linked to cell processes because energy is not related to matter.
C)since thoughts can repeat,the requirement for a continual input of energy to prevent entropy does not apply to this cell activity.
D)"thinking" is beyond the scope of science to study.

Question

Quizplus · Accepted Answer

The statement suggests that thinking involves metabolism within brain cells, which requires energy. This energy is supplied by the chemical bond energy in the food that we consume, which exceeds the cellular energy required for thinking. This statement rules out options B, C and D as they either contradict or do not address this fact.

Science Cannot Yet Describe "Thinking" in Physical Terms