Nervous System

• What two organ systems do humans rely on for communication?

  Nervous system and endocrine system
• What is the main function of the nervous system?

  To coordinate behavior and respond to surroundings
• What are the key components to know about the nervous system?

  • Structure of a nerve cell
  • Structure of the nervous system
  • How a reflex arc works
• What is another name for a nerve cell?

  Neuron
• How are neurons adapted to carry electrical impulses?

  They are long, thin, and have branch connections
• What is the role of a synapse in neuron communication?

  It connects two nerve cells for impulse transfer
• What happens when an electrical impulse reaches the end of a nerve cell?

  It causes the release of chemicals across the synapse
• What is the function of sensory neurons?

  To carry information from receptors to the CNS
• What does CNS stand for?

  Central Nervous System
• What do motor neurons do in the nervous system?

  They send impulses to effectors like muscles
• What is a reflex arc?

  • Nerve pathway for unconscious reflexes
  • Involves sensory neurons, relay neurons, and motor neurons
  • Enables rapid and automatic responses
• Why are reflexes beneficial?

  They allow rapid and automatic responses
• What is the first step when touching a sharp object?

  Receptor cells detect the pressure stimulus
• What happens to the impulse in the spinal cord during a reflex action?

  It transfers to a relay neuron
• What is the role of the relay neuron in a reflex arc?

  To pass the impulse to a motor neuron
• What type of effector is typically involved in reflex actions?

  Muscles or glands
• How is the electrical signal converted between neurons?

  It is converted to a chemical signal at synapses
• What happens after the impulse travels to the motor neuron?

  It travels to an effector to cause a response