THE NERVOUS SYSTEM
(CH.3)
· Body’s electrochemical communication circuitry.
ü Human nervous system is made up of billions of nerve cells
· The Brain and Nervous System move the body.

DIVISIONS of THE NERVOUS SYSTEM
Central Nervous System
· Spinal cord
· Brian
· Mid and forebrain

Peripheral Nervous System
· Somatic nervous system
ü Sensory nerves
· Automatic nervous system
ü Takes messages to and from the body’s internal organs.

v Cell body- part of a neuron that contains nucleus.
Sympathetic Nervous System
· Flight
· Fight
ü Eyes, lings, heart, stomach, blood vessels

Parasympathetic Nervous System
· Feeding
· Forceniction
ü Pupils get smaller, lungs and heart go slower, food digest slower, blood vessels go slower as well.

(LEFT Hemisphere) – speech and language
· Right hand and controls right side of the body
· Academics body side

(Right Hemisphere)
· Left hand and controls left side of the body
· Music and dance

Cerebral Cortex Lobes

· Frontal lobe- smell, personality, sexuality, movement and emotions
· Temporal lobe- hearing and visual
· Occipital- vision
· Parietal lobe- touch, taste, hear


Methods of the Brains
· Computerized Axial Tomography- cat scan, X-ray
· Magnetic Resonance Image- MRI
· Position Emission Tomography- pet scan

Hind Brain- located at the skull.
Brain Stem- the medulla, pons, and other parts of the hindbrain are together.
Mid brain- located between the hindbrain and the forebrain.
Fore Brain- largest division part


1. Define and give examples of afferent and efferent nerves.

2. Draw and label:
A) Cell Body
B) Dendrites
C) Nucleus
D) Axon
E) Myellin sheath
F) Terminal Button
G) Synapse

3. Parasympathetic or Sympathetic Branch?
1. Accelerates heartbeat=
2. Stimulates flow of saliva=
3. Dialates Pupil=

4. is a hormone and neurotransmitter that plays important roll in the experience of love and social
bonding.

5. Describe 3 ways to allow researchers to examine the brain while functioning.