1. Human body systems part II
Ch Central Nervous System

2. THE BRAIN
Contains billions of neurons (excitable cell that processes and transmits information by electrical and chemical signaling)
processes, relays, and form responses to a large amount of information every moment.

3. Spinal Cord Main communication link between the brain and the rest
of the body.

4. 1. Cerebrum: THE BRAIN PARTS
voluntary, or conscious, activities of the body
also site of intelligence, learning, and judgment

5. Cerebrum: Define the lobes pg. 903 Frontal Lobe: Temporal Lobe:
Parietal Lobe:
Occipital Lobe:

8. Pituitary Gland
Located at the base of the brain connected to ______________
Divided into 2 parts:
__________ and Posterior
Secretes hormones and ____________ _____________ _____________.
Its functions are important!
If the gland produces too much GH (growth hormone), the body grows too quickly resulting in _____________
Too little GH causes pituitary dwarfism.

9. 2. Limbic System: THE BRAIN PARTS emotion, behavior, and memory
____________: deep in brain deals with emotional learning (i.e. fear and
_________)
forms long-term memories
produces feelings of satisfaction and well-being

10. 3. Thalamus/Hypothalamus:
THE BRAIN PARTS
3. Thalamus/Hypothalamus:
found between brain stem and cerebrum
thalamus: ________ messages from sensory receptors, relays to region of cerebrum for processing
hypothalamus: control center for recognizing _______, thirst, fatigue, ________, and body temperature

11. 4. Cerebellum: THE BRAIN PARTS
Cerebellum learns movements and coordinates the actions of individual muscles when movement is repeated.
i.e. Hitting a golf ball

12. 5. Brain Stem: THE BRAIN PARTS
connects the brain and spinal cord underneath cerebellum
has 3 regions: _________, ___________, ____________
regulate flow of information between the brain and body

13. Addiction and the Brain
How do drugs change the brain and lead to addiction?
Dopamine: neurotransmitter that is associated with the brain’s _________ & _________centers.
________________: chemicals that send an impulse to another cell.
The brain reacts to too much dopamine levels and normal activities no longer produce the sensations of rewards as they did before.

14. Addiction and the Brain
How do drugs change the brain and lead to addiction?
Addicts feel depressed and sick without their drugs.
More drugs= ______________
Result= deeper and deeper spiral of _____________________________________ _____________________________________