The function of dendrites is toA. receive incoming signals from other neuronsB. release neurotransmitters into the spatial junctions between neuronsC. coordinate the activation of the parasympathetic and sympathetic nervous systemsD. control pain through the release of opiate-like chemicals into the brainE. transmit signals to other neurons


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With regard to the process of neural transmission, a refractory period refers to a time interval in whichA. a neuron fires more rapidly than usualB. an electrical charge travels from a sensory neuron to a motor neuronC. positively charged ions are pumped back outside a neural membraneD. am individual reflexively withdraws from a pain stimulusE. dendrites transmit more electrical signals to axons
In transmitting sensory information to the brain, an electrical signal travels from the ________ of a single neuron.A. cell body to the axon to the dendritesB. dendrites to the axon to the cell bodyC. axon to the cell body to the dendritesD. dendrites to the cell body to the axonE. axon to the dendrites to the cell body
Increasing excitatory signals above the threshold for neural activation will not affect the intensity of an action potential. This indicates that a neuron"s reaction isA. inhibited by the myelin sheathB. delayed by the refractory periodC. an all-or-none responseD. dependent on neurotransmitter moleculesE. primarily electrical rather than chemical
Your friend is taking her first psychology class. She comes to you saying, "I don"t understand why we are studying the brain; I thought this was a psychology class." Because of your background in psychology, your best response should beA. "It"s been known since Aristotle"s time that the brain is the center of intelligence and thought."B. "Phrenologists established the importance of studying the physical brain to understand mental abilities."C. "Science has demonstrated that Plato"s belief in the heart as the origin of emotion is correct."D. "Everything psychological is simultaneously biological."E. "Being able to name the parts of the brain helps us understand the basis of behavior."
Resting potential is to action potential as _______ is to _______.A. adrenal gland; pituitary glandB. sensory neuron; motor neuronC. temporal lobe; occipital lobeD. polarization; depolarizationE. dendrite; axon
An all-or-none response pattern is characteristic of theA. initiation of neural impulsesB. release of endorphins into the cereal nervous systemC. release of hormones into the bloodstreamD. activation of either the sympathetic or the parasympathetic systemE. excitation of the antagonistic hormonal system
Who believed that bumps on the skull reveal mental abilities and character traits?A. Sir Charles SherringtonB. Stephen KasslynC. Franz GallD. Candace PertE. Solomon Snyder
A brief electrical charge that travels down the axon of a neuron is called theA. synapseB. agonistC. action potentialD. myelin sheathE. refractory period
The slowdown of neural communication in multiple sclerosis involved a degeneration of theA. thresholdsB. dendritesC. endocrine glandD. myelin sheathE. axons
Which of the following are located exclusively within the brain and spinal cord?A. sensory neuronsB. motor neuronsC. myelin sheathD. interneuronsE. axons
Prozac, a drug commonly prescribed to treat depression, prevents the sending neuron from taking in excess serotonin. Which process does this drug prevent from taking place?A. depolarizationB. reuptakeC. the all-or-none responseD. an action potentialE. a refractory period
When the release of ACh. is blocked, the result isA. depressionB. muscular paralysisC. aggressionD. schizophreniaE. euphoria
A person with schizophrenia may have an overactive dopamine system. Drugs used to treat this disorder prevent the action of dopamine by keeping it from binding to its receptors. These drugs areA. agonistsB. somaticC. sympatheticD. antagonistsE. selectively permeable
Schizophrenia is most closely linked with excess receptor activity for the neurotransmitterA. dopamineB. epinephrineC. acetylcholineD. serotoninE. GABA
Alzheimer"s disease is most closely linked to the deterioration of neurons that produceA. dopamineB. acetylcholineC. epinephrineD. endorphinsE. glutamate
Psychoactive drugs interfere with normal neural transmission. Where does this interference take place?A. axonB. cell bodyC. myelin sheathD. synapseE. hormones
Within a single neuron the action potentialA. is generated in the dendritesB. will be slower if myelin is presentC. depends on the movement of charged calcium atomsD. travels in one direction toward the axon terminalsE. crosses the synapse to the adjacent neurons
The chemical messengers released into the spatial junctions between neurons are calledA. hormonesB. neurotransmittersC. synapsesD. sensory neuronsE. motor neurons
The tremors of Parkinson"s disease result from the death of nerve cells that produce the neurotransmitterA. serotoninB. ACh.C. GABAD. dopamineE. acetylcholine
Transferring messages from a motor neuron to a leg muscle requires the neurotransmitter known asA. dopamineB. epinephrineC. acetylcholineD. insulinE. endorphin
Opiate drugs occupy the same receptor sites asA. acetylcholineB. serotoninC. endorphinsD. dopamineE. epinephrine
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