One way in which exercise is believed to improve cognitive functioning is by increasing levels of ____________ in the brain

A) cortisol
B) brain-derived neurotrophic factor (BDNF)
C) glucocorticoids
D) flavonoids

Answer: B
Rationale: Levels of brain chemicals such as BDNF are boosted by exercise, which helps explain the changes in the brain that account for the cognitive benefits.

Psychology

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