2.5.1 The Nervous System

• The Central Nervous System (CNS) consists of the brain and the spinal cord.
• Match the nervous system division with its function:

  CNS ↔️ Information processing and coordination

  PNS ↔️ Connects CNS to the body
• What are the two divisions of the PNS?

  Sensory and motor
• What are the two main divisions of the PNS?

  Sensory and motor
• Match the Motor Division system with its function:

  Somatic Nervous System ↔️ Controls voluntary movements

  Autonomic Nervous System ↔️ Regulates involuntary functions
• The Sensory Division of the PNS transmits sensory information to the CNS.
• The withdrawal reflex pulls a limb away from a harmful stimulus.
• Reflex actions involve both the Peripheral Nervous System and the Central Nervous System.


  True
• What is the purpose of the pupillary light reflex?

  Adjust pupil size
• What are the two primary divisions of the nervous system?

  CNS and PNS
• The CNS regulates vital body functions like breathing and heart rate
• Match the PNS division with its function:

  Sensory Division ↔️ Transmits sensory information to CNS

  Motor Division ↔️ Controls voluntary and involuntary movements

  Parasympathetic Nervous System ↔️ Promotes rest and digest

  Sympathetic Nervous System ↔️ Prepares for fight or flight
• How do reflex actions contribute to homeostasis?

  Immediate reactions to stimuli
• Divisions of the PNS and their functions

  1️⃣ Sensory Division: Transmits sensory information to CNS

  2️⃣ Motor Division: Controls voluntary and involuntary movements

  3️⃣ Parasympathetic Nervous System: Promotes rest and digest

  4️⃣ Sympathetic Nervous System: Prepares for fight or flight
• The Peripheral Nervous System (PNS) connects the CNS to the rest of the body.


  True
• The CNS works with the PNS to transmit sensory information and motor commands.
• Match the PNS division with its function:

  Sensory Division ↔️ Transmits sensory information

  Motor Division ↔️ Relays motor commands
• The Sensory Division of the PNS transmits information about touch, vision, and hearing.


  True
• The Parasympathetic Nervous System promotes "rest and digest".
• What is a reflex action?

  Involuntary response to stimulus
• The withdrawal reflex pulls a limb away from a harmful stimulus
• Match the reflex action with its purpose:

  Knee-jerk reflex ↔️ Tests nervous system integrity

  Withdrawal reflex ↔️ Pulls limb away from harm

  Pupillary light reflex ↔️ Adjusts pupil size

  Sneeze reflex ↔️ Expels irritants
• The Central Nervous System includes the brain and spinal cord.


  True
• The CNS works with the PNS to process sensory information and coordinate responses.


  True
• The Somatic Nervous System controls voluntary movements through skeletal muscles
• What is the main function of the CNS?

  Process information and coordinate responses
• Reflex actions primarily involve the PNS and the spinal cord within the CNS.


  True
• What are the two main parts of the nervous system?

  CNS and PNS
• What are the main components of the CNS?

  Brain and spinal cord
• The CNS regulates vital body functions like breathing and heart rate.


  True
• The CNS regulates vital body functions such as heart rate and body temperature.
• What are the two systems within the Motor Division of the PNS?

  Somatic and autonomic
• What prepares the body for "fight or flight"?

  Sympathetic Nervous System
• Reflex actions involve the brain for decision-making.

  False
• What is the role of the brain in reflex actions?

  Not involved
• What does the knee-jerk reflex test?

  Nervous system integrity
• Reflex actions help the body maintain homeostasis
• What are the two divisions of the Peripheral Nervous System?

  Sensory and motor
• Divisions of the PNS and their subdivisions

  1️⃣ PNS

  2️⃣ Sensory Division

  3️⃣ Motor Division

  4️⃣ Somatic Nervous System

  5️⃣ Autonomic Nervous System

  6️⃣ Parasympathetic Nervous System

  7️⃣ Sympathetic Nervous System
• Reflex actions involve the brain to ensure immediate responses to stimuli.

  False