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Ch.3 Sect.1:The Nervous System

Published byἈριστομάχη Αλεβιζόπουλος Modified over 6 years ago

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Presentation on theme: "Ch.3 Sect.1:The Nervous System"— Presentation transcript:

1 Ch.3 Sect.1:The Nervous System

2 Human nervous system involved in thinking, dreaming, feeling, moving, and much more
Regulates internal & external functions When we learn a new behavior… Central Nervous—brain and spinal cord Peripheral Nervous—nerve cells that send messages between the central and all parts of body

3 Neurons Neuron=nerve cell Send and receive messages… 100 billion
Like a tree in structure Can lie end to end and “roots” are intertwined Cell body— Dendrites— Axon— Myelin— Axon terminals—

4 Neuron

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6 The Communication Process
Messages sent from axon terminals to dendrites of another Synapse— Messages travel in one direction Factors Sensory neurons— Motor Neurons— Troy Aikman

7

8 Neurotransmitters Neurotransmitters—
Several types and each has its own… How does it work? Involved in everything people do Diseases and disorders Acetylcholine Dopamine Noradrenaline serotonin

9 Central Nervous System
Spinal cord— Transmits messages between brain and muscles/glands Spinal reflexes Many simple reactions are reflexive Knee tap

10 The Peripheral Nervous System
Outside central nervous system and transmits messages between… Somatic Nervous System— Activated by… Enables us to experience the sensations… Alerts us… Autonomic Nervous System— Experience of emotion Sympathetic and parasympathetic

11 Ch.3 Sect.4:Heredity

12 Heredity— Helps psychologists understand why people behave in certain ways Traits help shape behavior Physical and psychological traits Environment also key role

13 Genes and Chromosomes Genes— Traits determined by…
Psychological traits… Chromosomes— DNA 46 for normal humans 22 of 23 pairs are similar in males and females Males have X and Y Females have two X Without 46?

14 Nature-Nurture Debate
Braelyn Brennan

15 Nature-Nurture Nature refers to… Nurture refers to…
Nurture includes family, education, culture, living conditions, etc. Supporting Nature… Supporting Nurture… Today most psychologists believe both are relevant Heredity and environment determine who we are Heredity still a hot topic

16 Kinship Studies Degree to which people are related (Identical twins, parent/child,bro/sis,aunt/uncle,cousins) Use this info to… Twin Studies Adoptee Studies Twins Reared Apart

17

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