Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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- Which is FALSE about neurons? A given neuron can be either a presynaptic neuron or a postsynaptic neuron. O An individual neuron can receive information from multiple other neurons. O An individual neuron can transmit information to multiple other neurons. O A neuron can simultaneously release more than one type of neurotransmitter. O A neuron receives information on its axons and delivers it to other neurons through its dendrites.arrow_forwardSynaptic delay :-a- is the time needed for release of neurotransmitter from synaptic vesiclesb- the minimal delay time in the central nervous system is about 0.5 millisecondc- is determined by the type of the neurotransmitterd- is determined by the number of postsynaptic receptorsarrow_forwardThe absolute refractory period of an action potentialA. only ensures one-way travel down an axon.B. only allows a neuron to ignore a second signal sent that closely follows the first.C. only prevents summation of action potentials within the axonD. ensures one-way travel down an axon and allows a neuron to ignore a second signal sent that closely follows the firstE. ensures one-way travel down an axon, allows a neuron to ignore a second signal sent that closely follows the first, and prevents summation of action potentials within the axonarrow_forward
- The greater the influx of calcium into the presynaptic axon terminal, the greater the O magnitude of inhibition. release of neurotransmitter. O amplitude of the action potential O rate of reuptake by an enzymearrow_forward(f) Parts of a Neuron A Axon (initial B segment) G H C D Synapse: The region where an axon terminal communicates with its postsynaptic target cell E F Output signal 02019 Pearson Education, Inc. Use the list below to identify D in the figure. postsynaptic neuron, integration, cell body, axon, action potential, presynaptic axon terminal, myelin sheath, synaptic vesicle, dendrites, input signal, Node of Ranvier, postsynaptic dendrite, nucleus, integration, axon hillock, voltage gated channel — Synaptic J cleftarrow_forwardDuring an IPSP, the postsynaptic membrane becomes more permeable to O GABA. O Ca2+. O Na+. O K+. serotonin.arrow_forward
- How do selective-serotonin reuptake inhibitors (SSRIS) increase serotonin in the synapse? O They cause excessive 5-HT release from the pre-synaptic neuron O SRIS prevent the inactivation of 5-HT in the synapse O SRIS block the reuptake of 5-HT into the pre-synaptic neuron O They actually don't increase 5-HT! D Question 10 Stimulants such as cocaine increase the neurotransmitter in the synapse O acetylcholine O serotonin O none of these O dopamine D Question 11 What brain area that is a target of the mesolimbic dopamine pathway is important for the rewarding effects of drugs? O nucleus accumbens O No answer text provided. O hippocampus O prefrontal cortexarrow_forward79.arrow_forwardNeuronal integration refers to the ability of neurons to respond to the combined effect of several EPSPs and IPSPs True Falsearrow_forward
- What is matched correctly? O Cholinergic receptor Norepinephrine () Skeletal muscle cells Muscarinic receptor Sympathetic nervous system Terminal ganglia O Sympathetic nervous system Paravertebral ganglion chainarrow_forwardThe monoamine hypothesis of depression proposes that monoamine oxidase is overproduced in very depressed people. O depression is a result of low monoamine levels at synapses. depression is a result of high monoamine levels at synapses. monoamine oxidase is absent in very depressed people.arrow_forwardOnce an action potential reaches a neurotransmitter release site, the release of the neurotransmitter is triggered by: The influx of Na* through voltage-gated channels. O The efflux of Na* through voltage-gated channels. The influx of K* through voltage-gated channels. The efflux of K+ through voltage-gated channels. The influx of Ca²+ through voltage-gated channels. O The efflux of Ca2+ through voltage-gated channels.arrow_forward
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