Sympathetic Nervous System Overview

These flashcards cover the key concepts related to the sympathetic nervous system and its role in the fight-or-flight response.

Sympathetic Nervous System (SNS)

Part of the autonomic nervous system that prepares the body for fight-or-flight responses.

Fight-or-Flight Response

A physiological reaction to a perceived harmful event or threat that prepares the body to either fight or flee.

Increased Mental Alertness

Heightened awareness and focus as part of the sympathetic nervous system activation.

Increased Metabolic Rate

The rate at which the body converts food into energy increases during sympathetic activation.

Decreased Urinary and Digestive Functions

Reduction in urinary output and digestive processes during fight-or-flight response.

Activation of Energy Reserves

Mobilization of stored energy sources in the body to meet heightened demands.

Increased Respiratory Rate and Bronchodilation

Expansion of the air passages and increase in breathing rate to supply more oxygen.

Increased Heart Rate and Blood Pressure

Elevated heart rate and blood pressure to enhance blood flow to muscles and vital organs.

Activation of Sweat Glands (Diaphoresis)

Stimulation of sweat production to cool the body during stressful situations.

Anticipating Energy Needs

Preparing the body by ensuring sufficient energy is available during stress.

Increased Blood Flow

Redirection of blood flow to essential areas to support fight-or-flight response.