While taking her GRE exam,LaFawnduh was concentrating so hard it almost hurt and the test left her feeling exhausted.A very large share of the energy LaFawnduh expended in her "mental efforts" was consumed by the ___ in her nervous system.
A)neurons
B)stress hormones
C)sodium-potassium pump
D)mitochondria

Question

Quizplus · Accepted Answer

The nervous system is responsible for processing information and carrying out mental efforts, which requires the use of neurons. The other options (B) stress hormones, (C) sodium-potassium pump, and (D) mitochondria, while important for various bodily processes, are not directly involved in mental efforts during an exam.

While Taking Her GRE Exam,LaFawnduh Was Concentrating So Hard It