NERVOUS SYSTEM Coordinates all activities in the body by transmitting messages back and forth to every cell of the body through _________________.

Central Nervous System _______________ and ______________ Receives messages from the PNS (__________________________________________________________________) and sends a response or reaction. Tells the body how to ______________________________________

_________________ About 18 +/- inches Sends messages from __________________________ to ________________________ and visa versa.

Brain _______________________________________________________________________________________________________________ Allows you to think, reason, coordinate, learn, remember, perform all bodily functions whether voluntary or involuntary

Brain Parts ______________ _______________

Cerebrum LARGEST, most complex part of brain Controls __________________________________________________________________________ ______________side controls the left side of the body ______________ side controls the right side of the body

Cerebrum Lobes ________________ Lobe _____________ Lobe

Frontal Lobe Voluntary ______________ Use of _________________

Parietal Lobe Sensory Information _____________ _____________—where your body is and what it is doing

Occipital Lobe __________________

Temporal Lobe _________________

___________________________ Coordinates movement of the skeletal muscles Posture Balance

Brain Stem 3-inch stalk of nerve cells and fibers that connect the __________________________________________________________________________ The “Gateway” from the brain to the body and the body to the brain

Brain Stem Parts _______________________ ____________________ Thalamus Hypothalamus

Medulla Oblongata The lowest portion of the brain stem Regulates _____________________ rate Regulates hearing, talking, and swallowing Regulates reflexes such as: ______________________

Pons Sits just above the M.O. Connects nerve impulses to other parts of the ______________________ Helps breathing Controls muscles of the ________________________________

Midbrain Highest portion of the brain stem Involved in controlling ________________ movement and _______________ size

_______________________ Relay center for incoming messages Kind of like the Pony Express, :~)

Hypothalamus Controls various body processes _________________ __________________ Through the __________________gland it controls metabolism, sexual development, and emotion

Peripheral Nervous System (PNS) Nerves outside of the ______________________________________ Sends info from inside and outside of your body to the CNS for the brain to respond to

PNS Parts A__________________ Nervous System

Autonomic Nervous System Controls Involuntary functions _______________________—Reflex—”Fight or Flight” _______________________—opposes actions of the sympathetic nervous system by slowing bodily functions during rest

Somatic Nervous System Relays messages from the eyes, ears, nose, tongue, and skin to the CNS which sends a response to the _______________________ muscles to move or react to a situation

Neurons Nerve cells Cell body -__________________________________________________________________________________—nucleus _______________—branched structures that extend from the cell body. They receive info from other neurons or sensory receptors and transmit impulses toward the cell body _______________—transmit messages away from the cell body and toward other neurons, cells, or glands

THE BRAIN