35 3 Divisions of the Nervous System Page

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 2 nd 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.