Download 35-3 Divisions of the Nervous System

35-3 Divisions of the Nervous
System
Page 901
A. The Central Nervous System (CNS)
• 1. The CNS is made up of the brain and spinal
cord.
A. The Central Nervous System (CNS)
• 2. The function of the CNS is to send
messages, process information, and analyze
information.
B. The Brain
• 1. The cerebrum is the largest region of the
human brain.
B. The Brain
• 2. The cerebrum controls voluntary
(controlled) actions of the body.
B. The Brain
• 3. The cerebellum is the 2nd largest region of
the brain located in the back of the skull.
B. The Brain
• 4. The brain stem connects the brain and
spinal cord.
B. The Brain
• 5. The thalamus receives messages from all
the sensory receptors and sends the
information to the cerebrum.
B. The Brain
• 6. The hypothalamus is the control center for
recognition and analysis of hunger, thirst,
fatigue, anger, and body temperature.
C. The Spinal Cord
• 1. The spinal cord
processes some
reflexes.
C. The Spinal Cord
• 2. A reflex is a quick automatic response to a
stimulus.
D. The Peripheral Nervous System
(PNS)
• 1. The PNS is made up of all the nerves that
are outside of the brain and spinal cord.
D. The Peripheral Nervous System
(PNS)
• 2. The sensory division sends impulses from
sense organs to the central nervous system.
D. The Peripheral Nervous System
(PNS)
• 3. The motor division sends impulses from the
central nervous system to the muscles.
D. The Peripheral Nervous System
(PNS)
• 4. The somatic nervous system controls
conscious movements, such as muscle
movement.
D. The Peripheral Nervous System
(PNS)
• 5. A reflex arc includes a sensory receptor,
sensory neuron, motor neuron and effector.
D. The Peripheral Nervous System
(PNS)
• 6. The autonomic
nervous system
regulates
involuntary
movements.