_________ is a drug that blocks inhibitory receptors, inhances cognition and has an activating effect on the CNS. 1. caffeine 2. nicotine 3.amphetamine 4.cocaine

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Stress

Stress is defined as the feeling of being overwhelmed or unable to cope with emotional or mental pressure. Any event or action that makes a person annoyed, furious, or nervous can trigger it. Chemical changes in the body caused by stress can cause blood pressure, blood sugar levels, and heart rate to rise.