PSY 1101 Chapter 2 Terms - PSY 1101 Chapter 2 Terms Biological Psychology Branch of psych concerned with the links between biology and

PSY 1101 Chapter 2 Terms - PSY 1101 Chapter 2 Terms...

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PSY 1101 Chapter 2 Terms Biological Psychology: Branch of psych concerned with the links between biology and behaviour (behavioural neuroscientists, neuropsychologists, behaviour geneticists, physiological psychologists, or bypsychologists). Neuron: a nerve cell; the basic building block of the nervous system. Sensory neurons: Neurons that carry incoming info from the sensory receptors to the brain and spinal cord. Motor Neurons : Neurons that carry outgoing info from the brain and spinal cord to the muscles and glands. Interneurons: neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs. Dendrite: The bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body. Axon: The extension of a neuron, ending in branching terminal fibers, through which messages pass to other neurons or to muscles or glands. Myelin Sheath: A layer of fatty tissue segmentally encasing the fibres of many neurons’ enables vastly greater transmission speed of neural impulse as the impulse hops from one node to the next. Threshold: level of stimulation required to trigger a neural impulse. Synapse: the junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. The tiny gap at this junction is called the synaptic gap or synaptic cleft Neurotransmitters: Chemical messengers that cross the synaptic gaps between neurons. When released by the sending neuron, neurotransmitters travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing whether that neuron will generate a neural impulse. Reuptake: a neurotransmitter’s reabsorption by the sending neuron.
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