2. Endocrine System The Glandular systems of the body
Hormones delivered by bloodstream

3. Hypothalamus- sends info to the glands to begin working
Pituitary Gland- “master gland” Growth, prolactin (milk production), Oxcytocin (stimulates labor)
Pineal Gland- melatonin and serotonin-regulation of circadian rythym
Thyroid and Parathyroid Glands-thyroxin- metabolism
Thymus-Thymosin (t-Cells) only active until puberty
Pancreas- digestion and control of blood sugar- insolin
Adrenal Glands- adrenalin, noradrenalin and cortical steroids- get you ready for action, resistance to stress/give energy
Ovary-Progesterone, Estrogen and actually a small amount of Testosterone-female characteristics
Testes-testosterone- male characteristics

4. Heredity
The transmission of characteristics from parents to offspring
Genes and Chromosomes
Genes- basic building blocks of heredity, traits are developed by pairs of genes
Genes are found in threadlike structures called Chromosomes
Chromosomes are composed of Deoxyribonucleic Acids DNA in the form of a double helix
pairs one set from dad, one from mom all the same except one set XX or XY
Anyone who doesn’t have 46 has difficulties- extra on 21st for example results in Down Syndrome

5. Nature v Nurture Key concept in psychological debate Kinship
Refers to degree to which people are related
Identical twins share 100% of their genetic material
Parent to child is 50%
Full brothers and sisters 50%
Aunts and Uncles 25%
1st Cousins 12.5 % (two unrelated parents)
People who are more closely related share more genetic traits
Twins Identical (same/same) v Fraternal (wombmates)
ID twins Great for studies
Any differences in them has to come from environmental factors
Raised together share many experiences and little differences
Raised separate really show environmental factors, however- intelligence, traditionalism, risk avoidance, aggression, and leadership seem to stay central show perhaps strongly associated with heredity
Many times same mannerisms such as posture