EVERYDAY SCIENCE

Detailed explanation-1: -Your sympathetic nervous system is a network of nerves that helps your body activate its “fight-or-flight” response. This system’s activity increases when you’re stressed, in danger or physically active.

Detailed explanation-2: -The amygdala tells the cortex how to respond-fight or flee-and the cortex passes this message onto the peripheral nervous system. Your extremities start to tingle, you start to sweat, your heart rate increases, your muscles tense. This fight or flight reaction is mobilized by the sympathetic nervous system.

Detailed explanation-3: -Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines-epinephrine and norepinephrine) to accelerate the heart rate.

Detailed explanation-4: -Nerves In the Peripheral Nervous System Autonomic: Controls involuntary function (e.g., blood pressure, digestion, heart rate). Motor: Connects the brain and spinal cord to muscles to stimulate movement.

Detailed explanation-5: -Your parasympathetic nervous system is a network of nerves that relaxes your body after periods of stress or danger. It also helps run life-sustaining processes, like digestion, during times when you feel safe and relaxed.