In the Fight-or-Flight response, which of the following occurs?

• A. Adrenaline begins to pump through the body
• B. Heart rate slows
• C. Senses dull completely
• D. Muscles relax heavily

Answer: (A)

Fight-or-Flight triggers the body's sympathetic nervous system to mobilize for quick action. A surge of adrenaline (epinephrine) into the bloodstream is the defining event, rapidly increasing heart rate and sending more blood to muscles, while boosting glucose availability and sharpening alertness. This adrenaline rush is what prepares you to either fight or flee. The other responses don’t fit: slowing the heart would reduce the body’s readiness for action, dulling the senses would impair awareness when danger is present, and heavy muscle relaxation would prevent the quick, ready-to-act state the body needs.