Function of Nervous System

• What does the right hemisphere of the brain control?

  Left side of the body
• What is the brain's role in decision-making?

  It is the center of conscious awareness (where all decision-making takes place)
• What functions does the brain stem govern?

  Automatic functions like heartbeat
• What does the PNS do?

  Receives and sends messages to the CNS
• What are neurons?

  Nerve cells that transmit messages
• What functions does the ANS control?

  Automatic (involuntary) functions
• What are examples of functions controlled by the ANS?

  Breathing, heart rate, digestion
• What does the SNS do?

  Sends information from the brain to muscles
• What is the role of the sympathetic division?

  Prepares the body for action in stress
• What is the role of the parasympathetic division?

  Returns the body to a resting state
• Why is the ANS considered an 'automatic' system?

  It operates without conscious direction
• How does the sympathetic nervous system affect the body?

  Increases heart rate and prepares for action
• How does the parasympathetic nervous system affect the body?

  Returns body to normal resting state
• What happens once the threat has passed?

  Parasympathetic division returns body to normal
• What is the role of the hypothalamus in the fight or flight response?

  Identifies a threatening event
• What is released from the adrenal glands during stress?

  Adrenaline
• What does adrenaline target in the body?

  The cardiovascular system
• What is the effect of adrenaline on digestion?

  It inhibits digestion
• What does the fight or flight response prepare the body for?

  Confronting the threat or fleeing
• What happens to hunger during the fight or flight response?

  It is inhibited
• What is the resting state of the body called?

  Rest and digest state
• What is the normal body temperature maintained by the ANS?

  37 degrees centigrade
• What is the relationship between the sympathetic and parasympathetic systems?

  They work in opposition to each other
• How does the sympathetic division prepare the body for action?

  By increasing heart rate and energy levels
• How does the parasympathetic division help after a threat?

  It restores the body to a calm state
• What is the role of the ANS in maintaining homeostasis?

  It keeps the body in a balanced internal state
• How does the ANS control breathing?

  It regulates breathing automatically
• What happens to the body during the fight or flight response?

  It prepares for immediate action
• What is the effect of adrenaline on heart rate?

  It increases heart rate
• What is the role of the ANS in stress response?

  It triggers fight or flight reactions
• What is the first step in the fight or flight response?

  The brain detects threat via hypothalamus
• What is the second step in the fight or flight response?

  The brain triggers sympathetic division of ANS
• What happens after the sympathetic division is triggered in the fight or flight response?

  There is a release of adrenaline into bloodstream
• What does the release of adrenaline cause in the fight or flight response?

  Increase in heart rate and breathing
• What are the final effects of the fight or flight response?

  Inhibition of digestion and increased saliva