PSY210H1 Lecture 3: Lecture 3-Guest by Julia Young
Document Summary
Nature and nurture from a biological perspective: genotype-indvls. Mutations-changes in sections of dna caused by random or environmental factors. Random assortment-shuffling of the 23 pairs of chromosomes in the sperm and egg-chance for which pair goes in. Crossing over-process by which sections of dna switch from one chromosome to another during meiosis, further increasing genetic variation: note-should understand basic mendelian genetics, heritability and adoption studies allow nature and nurture to be examines. Brain structure: neuron=nerve cell that transmits info. Understand all the parts of the neuron and the termanologies: neurogenesis=the creation of new neurons. Happens in the dentate gyrus of the hippocampus. Cerebral cortex-outer folds of the cortex are comprised of sulci(grooves) and gyri(bumps) Cerebral hemispheres are the right and left halves of the brain: ventricular system is filled with cerebro spinal fluid(csf) Fully turned over 3 times per day: by 2 years of age, brain is 80% of the adult size.
