1. Biology and Behavior
Chapter 3

2. The Nervous System Two main parts
Central Nervous System: the brain and the spinal cord
Peripheral Nervous System: contains nerve cells; has two divisions
Somatic Nervous System: activated by touch, pain, and temp
Automatic Nervous System: regulates the body’s vital functions (like our heartbeat)

3. The Brain

4. Parts of the Brain Pons: help regulate sleep
Cerebellum: controls balance and coordination
Limbic System: involved in learning, memory, emotion, hunger, sex, and aggression
Cerebrum/Cerebral Cortex: the part that does the thinking

5. The Two Halves Connected by the corpus callosum
Information received by one side of the body is transmitted to the opposite hemisphere of the brain
Don’t act independently, but some think…
Right brained people are creative
Left brained people are logical

6. The Endocrine System
Contains the glands that release hormones into our bloodstream
Pituitary Gland: releases growth hormones
Thyroid Gland: controls our metabolism
Adrenal Glands: help us with stressful situations
Testes/Ovaries: important for reproduction

7. Heredity: Our Genetic Background
Heredity: passing along traits from parents to offspring
Nature-Nurture Debate: How did we develop who we are?
Through Nature: our genetic make-up
Through Nurture: from our environment

8. Kinship Studies Explore the Nature-Nurture Debate
Twin Studies: look at identical and fraternal twins
Adoptee Studies: look at siblings not raised together
Twins Reared Apart: combines Twin Studies and Adoptee Studies

9. Your Assignment
Read about Bouchard’s study on page 73 and answer the question at the bottom. Do you agree with Bouchard?
Which side of the Nature-Nurture Debate are you on? Are you who you are from genetics or your environment?