Psychology 11th Edition chaPtEr 2 UPgrad Exam With QUEstion and corrEct ansWErs Pass a+ milanated - correct answer-has a segmented fatty tissue which allows for signals to jump from node to node (speeds up the process) electro-chemical - correct answe

Psychology 11th Edition chaPtEr 2 UPgrad Exam With QUEstion and corrEct ansWErs Pass a+ milanated - correct answer-has a segmented fatty tissue which allows for signals to jump from node to node (speeds up the process) electro-chemical - correct answer-electricity is created chemically nodes of nerves - correct answer-the gaps in a nerve curare - correct answer-An alkaloid neurotoxin that causes paralysis by blocking acetylcholine receptors in muscle.(similar to acetyl choline) botulism - correct answer-food poisoning. blocks Ach releases and paralyses(a toxin) black widow spider venom - correct answer-a poison produced by the black widow spider that triggers the release of acetylcholine and causes seizures and can be fatal too much dopamine - correct answer-schizophrenia Biological Perspective: - correct answer-Concerned with the links between biology and behavior. Includes psychologists working in neuroscience, behavior genetics, and evolutionary psychology. Neurons: - correct answer-Nerve cells, basic building block of the nervous system. Dendrites: - correct answer-A neuron's bushy, branching extensions that receive messages and conduct impulses toward the cell body. Axon (selectively permeable): - correct answer-The neuron extension that passes messages through its branches to other neurons or to muscles or glands. Myelin Sheath: - correct answer-A fatty tissue layer segmentally encasing the axons of some neurons; enables vastly greater transmission speed as neural impulses hop from one node to the next. Glial Cells: - correct answer-Cells in the nervous system that support, nourish, and protect neurons, they may also play a role in learning, thinking, and memory. Action Potential: - correct answer-A neural impulse; a brief electrical charge that travels down an axon. Refractory Period: - correct answer-A period of inactivity after a neuron has fired. Threshold: - correct answer-The level of stimulation required to trigger a neural impulse. All-or-none response: - correct answer-A neuron's reaction of either firing (with a full-strength response) or not firing. Synapse: - correct answer-The junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. Neurotransmitters: - correct answer-Chemical messengers that cross the synaptic gaps between the neurons. Reuptake: - correct answer-A neurotransmitter's reabsorption by the sending neuron. Endorphins: - correct answer-Neurotransmitter linked to pain control and to pleasure. Agonist: - correct answer-A molecule that increases a neurotransmitter's action. Antagonist - correct answer-: A molecule that inhibits or blocks a neurotransmitter's action. Nervous System: - correct answer-The body's speedy, electrochemical communication network, consisting of all the nerve cells of the peripheral and central nervous system.