1. UNIT 3: BIOLOGICAL BASES OF BEHAVIOR

2. READ ALONG WITH ME ON THE COUNT OF THREE Aoccdrnig to a rscheearch at an Elingsh uinervtisy, it deosn’t matter in what oredr the ltteers in a word are, the only imprmoetnt tihng is that the frist and lsat ltteer is at the rghit pclae. The rset can be a toatl mses and you can still raed it wouthit a porbelm. This is bcauseae we do not raed lteter by it slef, but the word as a wlohe!

3. THE BRAIN DOES AMAZING THINGS!

4. I. BIOLOGICAL APPROACH Tries to explain/understand the physiological and genetic of behavior. ONLY APPROACH IN PSYCHOLOGY THAT ATTEMPTS TO EXPLAIN BEHAVIOR IN TERMS OF THE PHYSICAL SYSTEMS: BRAIN ENDOCRINE SYSTEM ROLE OF GENETICS

5. BIOLOGICAL APPROACH CONTINUED… A.Applications Seen in Psychology: focus on stress, altered states, psychoimmunology (mental states on the immune system) B.History of….. Previously – all based on the concept of DUALISM, that the mind and body are distinct. C. Biological psychologist interested in how physiological things might shape behavior ie PMS D.Mind = our experiences of awareness and consciousness Body = our physical being E. EVERYTHING PSYCHOLOGICAL IS SIMULTANEOUSLY BIOLOGICAL!!!!!

6. II. NERVOUS SYSTEM : A.CENTRAL NERVOUS SYSTEM 1. Composed of the BRAIN and SPINAL CORD 2. Information HIGHWAY that connects peripheral nervous system to the brain

7. NEURONS Specialized cells are called NEURONS: wire like structures that carry messages from one point to another. 1. AXON: Largest part of the neuron 2. DENDRITES: a. Branching extensions on neurons. Receive incoming signals from other neurons. b.Some are covered in myelin sheath that helps info travel faster! 3. SYNAPSE: connected at junction, called the meeting point between neurons

8. NEURONS CONTINUED ACTION POTENTIAL: THRESHOLD: ALL OR NOTHING!

9. NEUROTRANSMITTERS NEUROTRANSMITTERS: Chemicals called neurotransmitters send info across synapse to the next neuron. The “messengers” TYPES:

10. PERIPHERAL NERVOUS SYSTEM 1.Nerve pathways outside of the CNS that control organs, motor control and sensations. 2.SENSORY NERVES: carry info to the CNS from senses MOTOR NERVES: Initiate muscle activity; called skeletal nervous system AUTONOMIC NERVES: carry info to organs/glands

11. SOMATIC & AUTONOMIC NERVOUS SYSTEMS Our peripheral nervous system has two components—somatic and autonomic. Somatic Nervous System: Autonomic Nervous System:

12. SYMPATHETIC & PARASYMPATHETIC The autonomic nervous system serves two important, basic functions Sympathetic Nervous System: Parasympathetic Nervous System:

14. ACTIVITY ACTIVITY: The Teen Brain Article- One Pager