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Name _________________________ Neurotransmission Practice 1. The extensions of the neuron that receives messages from other neurons are the _____________. 2. The extensions of a neuron that transmit information to other neurons are the _____________; some of these extensions are insulated by a layer of fatty cells called the ______________, which help speed the neuron’s impulses. 3. The neural impulse, or ______________________-, is a brief electrical charge that travels down a neuron. 4. The junction between two neurons is called a ______________. 5. The chemical messengers that convey information across the gaps between neurons are called ___________________. 6. Neurotransmitters influence neurons either by _______________ or ______________ their readiness to fire. 7. Excess neurotransmitters are reabsorbed to the sending neuron in a process called _______________________. 8. Among the neurotransmitters that researchers have pinpointed is ________, which influences movement, learning, attention, and emotions and seems to play a role in schizophrenia. 9. The neurotransmitter, ___________, affects mood, hunger, sleep, and arousal. 10. _____________ is an inhibitory neurotransmitter relating to hunger and sleep, and is enhanced by alcohol consumption. 11. Naturally occurring opiate-like neurotransmitters that are present in the brain are called ________________. When the brain is flooded with drugs such as _____________ or _____________________, it may stop producing these neurotransmitters. 12. Drugs that produce their effects by mimicking neurotransmitters are called ___________________. Drugs that block the effects of neurotransmitters by occupying their receptor sites are called ____________________. 13. The tremors of _______ disease are due to the death of neurons that produce dopamine. 14. __________ helps attention and motor movement. WORD BANK Axon terminals Action potential Agonists Dopamine Antagonists Exciting GABA Dendrites Inhibiting Endorphins Morphine Myelin sheath Heroin Norephinephrine Parkinson’s Neurotransmitters Serotonin Synapse Reuptake