brain

• What is essential for the survival of multicellular organisms?

  Internal communication among cells
• What are the two types of communication pathways in multicellular animals?

  Nervous system pathways and hormonal pathways
• How does the nervous system respond to changes in the body?

  By allowing cell groups to respond to internal and external changes
• What makes up the Central Nervous System (CNS)?

  The brain and the spinal cord
• What is the role of the CNS in the body?

  To respond to information from receptors and coordinate movement and responses
• What are the three parts of the brain?

  • Cerebrum
  • Cerebellum
  • Medulla
• What is the function of the cerebrum?


  Conscious thought, memory, imagination, and senses
• What is the function of the cerebellum?

  Coordination of movement
• What is the function of the medulla?

  Control of automatic processes like breathing and heart rate
• What are neurons?


  Specialized cells of the nervous system that conduct electrical impulses
• What are the main components of a neuron?

  A cell body and a long, thin axon
• What is the role of sensory neurons?

  To detect stimuli
• What happens after the sensory neuron detects a stimulus?

  The stimulus is processed in the brain by the interneuron
• What is the role of motor neurons?


  To make muscles respond to stimuli
• How do blood glucose levels fluctuate throughout the day?

  • Eating increases blood glucose levels
  • Exercise decreases blood glucose levels
• What is the automatic process controlled by the medulla?

  Breathing
• What is the role of the cerebellum in the brain?

  Coordination of movement
• What is the primary function of the cerebrum?

  To handle conscious thought and sensory processing