If a graded receptor potential made the resting membrane potential of the axon more negative, you would expect:Subsequent action potentials to be reduced in their amplitudeIt to be easier for this axon to reach threshold voltageIt to be more difficult for this axon to reach the threshold voltageSubsequent action potentials to be shorter in durationNo change in the ability of this axon to reach threshold voltage

Instead of being all-or-nothing, graded potentials are changes in membrane potential that come in…

If a graded receptor potential made the resting membrane potential of the axon more negative, you would ex O Subsequent action potentials to be reduced in their amplitude O It to be easier for this axon to reach threshold voltage O It to be more difficult for this axon to reach the threshold voltage O Subsequent action potentials to be shorter in duration O No change in the ability of this axon to reach threshold voltage

If a graded receptor potential made the resting membrane potential of the axon more negative, you would ex O Subsequent action potentials to be reduced in their amplitude O It to be easier for this axon to reach threshold voltage O It to be more difficult for this axon to reach the threshold voltage O Subsequent action potentials to be shorter in duration O No change in the ability of this axon to reach threshold voltage

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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An individual diagnosed with CMT has difficulty holding a cup because: a. The myelin in the motor neurons is damaged thereby preventing an impulse frommoving along the axonb. The myelin in the sensory neurons is damaged thereby preventing an impulse frommoving along the axonc. The dendrites in the motor neurons are damaged thereby preventing an impulse frommoving along the axond. The dendrites in the sensory neurons are damaged thereby preventing an impulse frommoving along the axon
Which of the following neuronal changes is associated with short term synaptic strength? O a. Changes in the size of neural spines o b. Changes in the shape of neural spines с. Increased production of neurotransmitter vesicles in the presynaptic cell o d. Increased buildup of Ca²+ in the terminal knob of the presynaptic axon О е. Increased expression of postsynaptic neurotransmitter receptors
Neuronal integration refers to the ability of neurons to respond to the combined effect of several EPSPs and IPSPs True False
Once 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.
An action potential is generated at the... trigger zone of the axon postsynaptic membrane cell body axon terminal
What is the function of the axon? to receive information and information into the cell body O to store genetic material and act as the metabolic centre of the neuron O to transmit information away from the soma to other neurons O to separate one neuron from neighbouring neurons
In terms of function when a presynaptic neuron receiving input from a nearby inhibitory neuron, it can be inferred that the both neurons firing won't be synchronized activation of the inhibitory neuron is nullified activation of the presynaptic neurotransmitter release is enhanced this type of interaction represents a regulatory input of neuronal activation
Action potentials are produced by voltage-gated channels True False
Which statement about the synapse is false?
Researchers have designed a neuron that's unable to produce and release neurotransmitters. Can that neuron still have an action potential? Choose the answer with the correct answer and the correct reasoning. O No, action potentials need neurotransmitters to increase message speed O No, a neuron can't receive messages without its own neurotransmitters O No, a lack of neurotransmitters would leave a neuron unmyelinated O No, action potentials don't occur in the axon O Yes, action potentials don't require neurotransmitters:
(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 Person 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 cleft J
4.3. After the rising phase, which ion channel is responsible for action potential returning to its resting V and why? Na channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise V O Na* channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise V, m O K* channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm U K* channels, because positive K* ions are at higher concentration inside the axon than outside, and so they leave the axon and lower Vm