Psych Quiz 2

Psych Quiz 2 - Psych Quiz 2 Nature vs. Nurture: nature is a...

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Psych Quiz 2 Nature vs. Nurture: nature is a person’s biology and makeup or genes Biological basis of behavior Biological Psychology - Branch of psych concerned with the links between biology and behavior - Neuron: simplest unit, building block of nervous system o Conduct ions in form of electricity o Dendrite: the bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body o Axon: extension of neuron, ending in branching terminal fibers, through which messages are sent to other neurons, muscles, or glands o Myelin Sheath: a layer of fatty cells encasing the gibers of many neurons, enables greater transmission speed of neural impulses o Terminal branches of axon: electrical current stimulates chemical release Neural Communication - Action Potential: a neural impulse; a brief electrical charge that travels down an axon o Generated by movement of positively or negatively charged atoms in and out of channels in the axon’s membrane - Threshold: the level of stimulation required to trigger a neural impulse - Synapse: junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron o Tiny gap at this junction is called synaptic gap or cleft - Neurotransmitters: chemical messengers that traverse the synaptic gaps between neurons o When released by the sending neuron, neurotransmitters travel across the synapse and bind to receptor sites on receiving neuron, thereby influencing whether it will generate a neural impulse o Acetylcholine: enables muscle action, learning, and memory….motor movement o Dopamine: limbic function, learning, emotion, voluntary movement… Parkinson’s and schizophrenia o Serotonin: affects hunger, emotion, and sleep…linked to depression o Norepinphrine: involved in arousal/alertness o Gaba: inhibits the brain, pain related disorders o Glutamate: excitation, over stimulates brain, seizure disorders o Endorphins: linked to pain control and please o Agonist: action that a neural chemical can have, allows activity at receiving cell o Antagonist: stops the receptor from functioning, inhibits electrical activity The Nervous System
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- Nervous System: The body’s speedy, electrochemical communication system o Consists of all nerve cells - Central Nervous System: brain and spinal chord - Peripheral Nervous System: sensory and motor neurons o Autonomic: self regulated action of internal organs and glands Sympathetic: arouses the body Parasympathetic: calms the body o Skeletal: voluntary movements of skeletal muscle - Nerves: neural “cables” containing many axons o Part of peripheral nervous system o Connect CNS with muscles, glands, and sense organs - Sensory Neurons: carry information from sense receptors to CNS - Interneurons: CNS neurons that internally communicate and intervene between sensory inputs and motor outputs - Motor Neurons: carry outgoing information from CNS to muscles and glands
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This test prep was uploaded on 04/07/2008 for the course PSY 101 taught by Professor Ricci during the Spring '08 term at Northeastern.

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Psych Quiz 2 - Psych Quiz 2 Nature vs. Nurture: nature is a...

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