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Unit 3
The Biological Basis of Behavior
Term | Definition |
---|---|
Genotype | The genetic structure an organism inherits from its parents. |
Phenotype | The observable characteristics resulting from the interaction between one's genotype and it's environment. |
Heredity | The transmission of traits from parents to offspring. |
Genetics | The inheritance of physical and psychological traits of ancestors. |
Genes | The biological units of heredity responsible for the transmission of traits. |
Sociobiology | The evolutionary explanation for the socail behavior and social systems of human and other animal species. |
Broca's Area | The region of the brain that translates thoughts into speech. |
Lesions | Injuries to or destruction of brain tissue. |
Electroencephalogram(EEG) | A recording of the electrical activity of the brain. |
PET scans | Provides a picture of the brain by recording the radioactivity emitted by cells during cognitive or behavioral activities. |
Magnetic Resonance Imaging | Provides a picture of the brain by using magnetic and radio waves. |
Peripheral Nervous System | Part of the nervous system that is composed of the spinal cord and cranial nerves that connect the sensory receptors to muscles and glands. |
Somatic Nervous System | The subdivision of the peripheral nervous system that connects the central nervous system to the skeletal muscles. |
Central Nervous System | Part of the nervous system consisting of the brain stem and the spinal cord. |
Autonomic Nervous System | The subdivision of the peripheral nervous system that connects the body's involuntary motor responses to the smooth, cardiac muscle and glands. |
Sympathetic Division | The subdivision of the autonomic nervous system that deals with emergency response and mobilization of energy. |
Parasympathetic Division | The subdivision of the autonomic nervous system that monitors the body's internal functions and conserves body energy. |
Brain Stem | The brain structure that regulates the basic life processes. |
Medulla | The region of the brain stem that regulates breathing, waking, and heartbeat. |
Pons | The region of the brain stem that connects the spinal cord with the brain. |
Reticular Formation | The region of the brain stem that alerts the cerebral cortex to incoming sensory signals and is responsible fro maintaining consciousness and awakening from sleep. |
Thalamus | The brain structure that relays sensory impulses to the cerebral cortex |
Cerebellum | The region of the brain that controls motor coordination, posture, and balance, as well as the ability to learn control of body measurements. |
Limbic System | The region of the brain that regulated emotional behavior, basic motivational urges, and memory, as well as major physiological functions. |
Hippocampus | The part of the limbic system that is involved in explicit memory. |
Amygdala | The part of the limbic system that controls emotion, aggression, and emotional memory. |
Hypothalamus | The brain structure that regulates eating, drinking, and homeostasis. |
Neurotransmitters | Chemical messengers released from neurons that cross the synapse from one neuron to another, stimulating the postsynaptic neuron. |
Occipital Lobe | The rearmost region of the brain, which contains the primary visual cortex. |
Parietal Lobe | The region of the brain behind the frontal lobe and above the lateral tissue; contains the somatosensory cortex. |
Pituitary Gland | Located in the brain, the gland that secretes growth hormone and influences the secretion of hormones by other endocrine glands. |
Refractory Period | The period of rest during which a nerve impulse cannot be activated in a segment of an axon. |
Sensory Neuron | The neuron that carries messages from sense receptors toward the central nervous system. |