1. Chapter 3 Biology and Behavior
The Endocrine System
Chapter 3
Biology and Behavior

2. Consists of glands that secrete hormones
Endocrine System
Consists of glands that secrete hormones
Produced by glands
Received by specific neuron receptors

3. The Pituitary Gland “Master Gland”
Stimulated by hypothalamus
Growth hormone (muscles, bones, glands)
Prolactin (nursing), oxytocin (labor),

4. Thyroid Gland
Produces thyroxin, which controls metabolism (changing food to energy)
Too little = hypothyroidism (overweight)
Too much = hyperthyroidism (weight loss, insomnia)

5. Adrenal Gland Cortical steroids (stress and muscle)
Adrenaline & noradrenaline (increase blood pressure and arouse the body)

6. SORRY NO PICTURES AVAILABLE
Testes and Ovaries
Hormones
Testosterone
Kind of steroid
Male sex hormone
Influences muscle development
Estrogen & Progesterone
Female sex hormones
Influences development
SORRY NO PICTURES AVAILABLE

7. Heredity: Our Genetic Background

8. Heredity The transmission of characteristics from parents to children
Physical traits
Psychological traits
Disorders

9. Genes Basic building blocks of hereditary
Determined by pairs, one each inherited from a parent

10. Chromosomes Chromosomes
Threadlike structures that house genes, composed of DNA
Most cells have 46 chromosomes, organized into 23 pairs
23rd pair determines gender

11. Nature vs. Nuture Nature = biology
Nuture = environmental factors (family, education, culture, experiences, etc.)

12. Kinship Studies Twin Studies Adoptee Studies Twins Reared Apart
Identical and fraternal
Adoptee Studies
Separated from families, still exhibit biological traits?
Twins Reared Apart