Unit 2 Practice - Neuroscience
Quiz by Victor Cadilla
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19 questions
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- Q1Which of the following is the correct sequence of parts of a neuron firing?Dendrites, soma, axon, vesicles, neurotransmittersIons, axons, soma, dendrites, synapseDendrites, soma, axon, synapse, ionsSynapse, soma, axon, dendrites, neurotransmitters45s
- Q2The branching fibers of the ___________ end in __________ and link with parts of other neurons.nucleus; nucleic damperssoma; somatic membranesaxon; terminal branchesdendrite; dendritic arcs45s
- Q3Which of the following is the closest voltage to the threshold for firing inside a nerve cell?+ 100 millivolts- 10 millivolts+10 millivolts- 50 millivolts45s
- Q4If the electrical charge of the neuron changes to about - 55 millivolts, the neuron will reach its __________ for firing.synaptic potentialsomanegative after-potentialthreshold45s
- Q5Communication within a neuron is _________, while communication between neurons is ____________.chemical; electricalelectrical; chemicalchemical; electricalelectrical; mechanical45s
- Q6The paralyzing effect of poison is caused by its ability toblock the action of acetylcholine at neuron-muscle synapsesproduce a disintegration of the synapseproduce an overproduction of acetylcholine in the neural synapsecreate an imbalance in the sodium content in the dendrite45s
- Q7Carlos is relaxed and about to fall asleep. Which neurotransmitter is slowing down the activity of the nervous system and making him feel drowsy before bed?dopamineGamma Amino Butyric Acidendorphinsacetylcholine45s
- Q8Which part of the nervous system is most immediately activated by sudden loud thunder?ParasympatheticCorticalSympatheticSomatic45s
- Q9The section of the brain considered most important to the initiation of feeding behaviors is thesuprachiasmatic nucleuspituitary glandhippocampushypothalamus45s
- Q10Alexia accidentally touched a hot iron. She immediately pulled her hand back. Which of the following is true about the withdrawal of her hand?It was initiated by the spinal cordIt was initiated by the motor cortexIt was a voluntary behaviorIt was an operantly conditioned response45s
- Q11Omotoyosi has a brain injury and is having difficulty with vision and audition. These symptoms indicate that damage has occurred in the...occipital and temporal lobesfrontal and temporal lobesparietal and occipital lobesboth temporal lobes45s
- Q12If a neuron is in a resting state, which of the following is true?The neuron is not polarizedBoth sodium and potassium channels are openThe inside of the cell membrane is negative compared to the outsideThe concentration of sodium ions is equal inside and outside the cell membrane45s
- Q13The primary purpose of myelin sheath is toincrease the speed of conduction of the action potential along the axonfacilitate the incoming stimulus signals as sensory receptorsincrease the speed of passage of the action potential across the synapseprotect the terminal buttons of the neuron from damage by enzymes45s
- Q14Which of the following would be most useful for detecting the exact location of a brain lesion?an EEGa hemispherectomya PET Scana CT Scan45s
- Q15After suffering an accidental brain injury, Kira has difficulty walking in a smooth and coordinated manner. It is most probable that she has suffered damage to her:spinal cordfrontal lobecerebellummotor cortex45s