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PSYCH 1.1-1.2
| Term | Definition |
|---|---|
| Heredity (nature) | the genetic transfer of characteristics from parent to offspring |
| Environment (nurture) | every non-genetic influence, from prenatal nutrition to the people and things around us |
| Genes | the biochemical units of hereditary that make up the chromosomes --> 20,000 genes |
| Natural Selection | traits that help organisms survive and reproduce in an environment are more likely to be passed on to succeeding genotypes |
| Evolutionary Psychology | The study of how behaviors and mental processes present in the species today exist because they were naturally selected |
| Behavior Genetics | the scientific study of how both genetic inheritance and environmental factors shape individual differences in behavior and psychological traits |
| Human Genome | the complete instructions for making a human organism, consisting of all the genetic material in that human's chromosomes |
| Mutation | a random error in gene replication that leads to a change |
| Monozygotic Twins | a single fertilized egg that splits in two, genetically identical organisms |
| Dizygotic Twins | separate fertilized eggs that share a maternal prenatal environment |
| Epigenetics | the study of environmental influences on gene expression that occur without a DNA change |
| Nervous System | the body's speedy, electrochemical communication network, consisting of all nerve cells of the peripheral and central Nervous systems |
| Nerves | bundled axons of many neurons that form neural cables connecting the central nervous system with muscles, glands, and sense organs |
| Afferent Neurons | send signals to brain (sensory) |
| Efferent Neurons | move ---> signals from brain to muscle (motor) |
| Interneurons | connects sensory and motor neurons |
| Sensory Neurons | converts external and internal environmental stimuli into electrical signals and transmits them to the CNS |
| Motor Neurons | transmit electrical signals to control all voluntary and involuntary muscle movements |
| Central Nervous System (CNS) | brain and spinal cord --> decision maker, responsible for coordinating incoming sensory messages and outgoing motor messages |
| Peripheral Nervous System (PNS) | sensory and motor neurons --> connects the body to the CNS by gathering information from the senses and transmitting messages from the CNS |
| Somatic Nervous System | controls the body's skeletal muscles |
| Autonomic System | controls the glands and the muscles of the internal organs --> automatically |
| Sympathetic Nervous System | arouses the body, mobilizing its energy --> fight, flight, or freeze |
| Parasympathetic Nervous System | calms the body, conserving its energy --> rest or digest |
| Reflex Arc | the pathway that a reflex takes in the body |