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Psych quiz 3
Chapter 4
| Term | Definition |
|---|---|
| Central Nervous System | The portion of the nervous system consisting of the brain and spinal cord. |
| Spinal cord | A collection of neurons and supportive tissue running from the base of the brain down the center of the back, protected by a collum of bones (The spinal collum). |
| Peripheral Nervous system | All Portions of the nervous system outside the brain and spinal cord, including sensory and motor nerves. |
| Somatic/Skeletal nervous system | The Subdivision of the Peripheral nervous system that connects to sensory receptors and to skeletal muscles. |
| Autonomic Nervous system | The Subdivision of the PNS that regulates the internal organs and glands. |
| Sympathetic Nervous system | The Subdivision of the Autonomic nervous system that mobilizes bodily resources and increases the output of energy during emotion and stress. |
| Parasympathetic nervous system | The Subdivision of the Autonomic nervous system that operates during relaxed states and conserves energy. |
| Nueron | A cell (also called a nerve cell) that conducts electrochemical signals and forms the basic unit of the nervous system. |
| Glia | Cells that support, nurture, and insulate neurons; remove debris when neurons die; enhance the formation and matinence of the neural connections; and modify neuronal functioning. |
| Dendrites | A neuron's branches that receive information from other neurons and transmit it toward the cell body. |
| Cell body | The part of the neuron that keeps it alive and determines whether or not it will fire. |
| Axon | A Neuron's extending fiber that conducts impulses away from the cell body, transmitting them to other neurons. |
| Myelin Sheath | A fatty insulation that may surround the Axon of a neuron. |
| Nerve | A bundle of nerve fibers (Axons and sometimes dendrites in the PNS). |
| Neurogenesis | The production of new neurons from immature stem cells. |
| Stem cells | Immature cells that renew themselves and have the Potential given encouraging environments, to develop into mature cells of any type. |
| Cell body | The part of the neuron that keeps it alive and determines whether or not it will fire. |
| Synapse | The site where transmission of a nerve impulse from one nerve cell to another occurs; it includes the Axon terminal, the synaptic cleft, and receptor sites in the membrane of the receiving cell. |
| Axon | A Neuron's extending fiber that conducts impulses away from the cell body, transmitting them to other neurons. |
| Myelin Sheath | A fatty insulation that may surround the Axon of a neuron. |
| Hormones | Chemical substances, secreted by organs called glands, that affect the functioning of other organs. |
| Nerve | A bundle of nerve fibers (Axons and sometimes dendrites in the PNS). |
| Endocrine glands | Internal organs that produce hormones and release them into the bloodstream. |
| Neurogenesis | The production of new neurons from immature stem cells. |
| Melatonin | A hormone, secreted by the pineal gland, that is involved in the regulation of daily biological rythms. |
| Stem cells | Immature cells that renew themselves and have the Potential given encouraging environments, to develop into mature cells of any type. |
| Oxytocin | A hormone, secreted by the pituitary gland, that stimulates uterine contractions during childbirth, facilitates the ejection of milk during nursing, and seems to promote attachment and trust in relationships. |
| Synapse | The site where transmission of a nerve impulse from one nerve cell to another occurs; it includes the Axon terminal, the synaptic cleft, and receptor sites in the membrane of the receiving cell. |
| Action Potential | A brief change in electrical voltage that occurs between the inside and the outside of an Axon when a neuron is stimulated producing an electronical impulse. |
| Neurotransmitter | A chemical substance that is released by a transmitting neuron at the synapse, altering the activity of a receiving neuron. |
| Hormones | Chemical substances, secreted by organs called glands, that affect the functioning of other organs. |
| Endocrine glands | Internal organs that produce hormones and release them into the bloodstream. |
| Melatonin | A hormone, secreted by the pineal gland, that is involved in the regulation of daily biological rythms. |
| Oxytocin | A hormone, secreted by the pituitary gland, that stimulates uterine contractions during childbirth, facilitates the ejection of milk during nursing, and seems to promote attachment and trust in relationships. |
| Cell body | The part of the neuron that keeps it alive and determines whether or not it will fire. |
| Axon | A Neuron's extending fiber that conducts impulses away from the cell body, transmitting them to other neurons. |
| Myelin Sheath | A fatty insulation that may surround the Axon of a neuron. |
| Nerve | A bundle of nerve fibers (Axons and sometimes dendrites in the PNS). |
| Neurogenesis | The production of new neurons from immature stem cells. |
| Stem cells | Immature cells that renew themselves and have the Potential given encouraging environments, to develop into mature cells of any type. |
| Synapse | The site where transmission of a nerve impulse from one nerve cell to another occurs; it includes the Axon terminal, the synaptic cleft, and receptor sites in the membrane of the receiving cell. |
| Action Potential | A brief change in electrical voltage that occurs between the inside and the outside of an Axon when a neuron is stimulated producing an electronical impulse. |
| Neurotransmitter | A chemical substance that is released by a transmitting neuron at the synapse, altering the activity of a receiving neuron. |
| Hormones | Chemical substances, secreted by organs called glands, that affect the functioning of other organs. |
| Endocrine glands | Internal organs that produce hormones and release them into the bloodstream. |
| Melatonin | A hormone, secreted by the pineal gland, that is involved in the regulation of daily biological rythms. |
| Oxytocin | A hormone, secreted by the pituitary gland, that stimulates uterine contractions during childbirth, facilitates the ejection of milk during nursing, and seems to promote attachment and trust in relationships. |
| Adrenal hormones | Hormones that are produced by the adrenal glands and that are involved in emotion and stress. |
| Sex hormones | Hormones such as androgens, estrogen, and progesterone that regulate the development and functioning of reproductive organs and stimulate the development of sexual characteristics, |
| Endorphines | Chemical substances in the nervous system that are involved in pain reduction, pleasure, and memory, and are known technically as endogenous opioid peptides. |
| Lesion method | The removal or disabling a non-human animal's brain structure to gain better understanding of its function. |
| TMS | A Method of manipulating brain cells, using a powerful magnetic field produced by a wire coil placed on a person's head, that can be used by researchers to temporarily stimulate or inactivate neural circuits. |
| tDCS | A technique that applies a very small electric current to stimulate or suppress activity in parts of the cortex. |
| EEG | A recording of neural activity detected by electrodes. |
| ERP | A technique that isolated the neural activity associated with a specific stimulus ("event"). |
| PET scan | A Method for analyzing biochemical activity in the brain, for example, by using injections of glucose-like substance continuing a radioactive element to measure glucose metabolism in the brain. |
| MRI | A method for studying body and brain tissue, using magnetic felids and special radio receivers. |
| fMRI | A type of magnetic resonance imagining used to study brain activity associated with specific thoughts and behaviors. |
| Brain stem | The part of the brain at the top of the spinal cord, consisting of the medulla and the pons. |
| Medulla | A structure in the brain stems responsible for certain automatic functions, such as breathing and heart rate. |
| Pons | A structure in the brain stem involved in, among other things, sleeping, waking, and dreaming. |
| RAS | A dense network of neurons found in the core of the brain stem that arouses the cortex and screens incoming information. |
| Thalamus | A brain structure that relays sensory messages to the cerebral cortex. |
| Hypothalamus | A brain structure involved in emotions and drives that are vital to survival; it regulates the Autonomic nervous system. |
| Pituitary gland | A small endocrine gland at the base of the brain that releases many hormones and regulates other endocrine glands. |
| Amygdala | A brain structure involved in assessing the potential biological impact of incoming sensory information and driving the body's response to it. |
| Hippocampus | A brain structure involved in the storage of new information in memory. |
| Cerebrum | Divided into 2 hemispheres, this upper part of the brain is in charge of most sensory, and cognitive process. |
| Cerebral hemispheres | The 2 halves of the cerebrum. |
| Corpus Callosum | The bundle of nerve fibers connecting the 2 cerebral hemispheres. |
| Laterization | Specialization of the 2 cerebral hemispheres for particular operations. |
| Cerebral cortex | A collection of several thin layers of cells covering the cerebrum that is largely responsible for higher mental functions |
| Occipital Lobes | Lobes at the lower back part of the brain's cerebral cortex containing areas that receive visual information. |
| Parietal Lobes | Lobes at the upper back part of the brain's cerebral cortex containing areas that receive information on pressure, pain, touch, and temperature as well as handle attention and awareness of spatial relationships. |
| Temporal Lobes | Lobes at the sides of the brain's cerebral cortex containing areas involved in hearing, emotion, memory, visual processing and (in the left lobe, typically language comprehension). |
| Frontal Lobes | Lobes at the front of the Brain's cerebral cortex containing areas involved in movement, working memory, controlling emotions and impulses, higher-order thinking, and (in the left lobe, typically,) speech production. |
| Plasticity | The brain's ability to change and adapt in response to experiences through neurogenesis or by reorganizing or growing new neural connections. |