nervious system

• What is homeostasis?

  Maintaining constant internal conditions
• What are the components of an automatic control system?

  Stimulus, receptor, coordination center, effector, response
• What are the two parts of the nervous system?

  Central nervous system and peripheral nerves
• What does the central nervous system consist of?

  Brain and spinal cord
• What is the role of receptors in the nervous system?

  Detect stimuli and send impulses
• What are neurons also known as?

  Nerve cells
• What is the function of effectors in the nervous system?

  Bring about a response
• What are the two types of effectors mentioned?

  Muscles and glands
• How does the nervous system help humans?

  Enables reaction to surroundings and behavior coordination
• What is the reflex arc?

  A pathway for reflex actions
• What happens when you touch a hot object?

  The reflex arc is activated
• What is the first step in the reflex arc when touching a hot object?

  Stimulus is detected by a receptor
• What type of neuron carries impulses to the central nervous system?

  Sensory neuron
• What occurs at the synapse between sensory and relay neurons?

  A chemical is released to trigger an impulse
• What is the role of the relay neuron?

  Passes impulses within the central nervous system
• What happens at the second synapse in the reflex arc?

  A chemical triggers an impulse in a motor neuron
• What is the final step in the reflex arc?

  The muscle contracts to pull away
• Why are reflex actions important?

  They are automatic and rapid for protection
• How do reflexes differ from other actions in the nervous system?

  Reflexes do not involve conscious decision-making
• What is the role of the central nervous system in reflexes?

  Acts as a coordinator for reflex actions
• What is the significance of the rapid nature of reflexes?

  Helps protect us from danger quickly
• How does the reflex arc illustrate the function of the nervous system?

  It shows automatic responses to stimuli