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Check T if the statement is true, and F if it is false.
T
F
1 Participants in the psychological experiments were asked
to do tasks at varying levels of difficulty.
2 Cells are unable to function properly when we are hungry
because of the low blood glucose levels.
3 An empty stomach elevates serotonin levels in the brain
and enhances cognitive functioning.
4 Loneliness and hunger stimulate the same area of the brain.
true//true//false//true