Why can a neuron only send a signal in one direction? Because an action potential only travels from dendrite to axon terminals Because my teacher says! (This is not the answer) The fibers of a neuron are only facing in one direction After a membrane experiences an action potential it is in the refractory period and can no longer "fire"

Why can a neuron only send a signal in one direction? Because an action potential only travels from dendrite to axon terminals Because my teacher says! (This is not the answer) The fibers of a neuron are only facing in one direction After a membrane experiences an action potential it is in the refractory period and can no longer "fire"

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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Similar questions

Why does an action potential move in an all-or-nothing fashion down the length of an axon without stopping?
Which of the following situations in a neuron results in action potentials that have extended depolarization phases? O None of these result in extended depolarization phase. O Compromising the inactivation mechanism in voltage-gated Na* channels. O Stimulating the voltage-gated K* channels. O Inhibiting the voltage-gated Na* channels. O Compromising the inactivation mechanism in voltage-gated K* channels.
Which very specific synapse will produce the fastest propagation of an action potential? axosomatic synapse spine synapse axodendritic synapse spinosomatic shaft synapse
An action potential is generated at the... trigger zone of the axon postsynaptic membrane cell body axon terminal
On this motor neuron, Add in and label: dendritic spines an axon collateral, with axon terminals synaptic knobs myelin on the axon and axon collateral synaptic knobs Draw arrows and label: ахon axon terminals synaptic knobs cell body dendrites and dendritic spines And draw an arrow showing the direction the action potential travels.
You have a photoreceptor cell in a dish. You are recording its membrane potential while flashing different intensities of light. Which of the following would you observe? Group of answer choices The cell hyperpolarizes, with brighter light causing more hyperpolarization than dimmer lights The cell depolarizes, with brighter light causing more depolarization than dimmer lights If the light is bright enough to reach threshold, it will fire an action potential No change in membrane potential will be observed
A chemical synapse ALWAYS includes 1. axon terminal 2. presynaptic cell 3. synaptic cleft 4. postsynaptic cell 5. dendrite O 1,2,3,4 O 1,3,4 O 2,3,4 O 1,2,3,4,5
Which of the following is FALSE about action potentials? At resting potential, there are more potassium channels open and most sodium channels are closed. Depolarization is due to the flow of Na+ out of the axon via voltage-gated Na+ channels. Hyperpolarization is due to continued loss of K+ from the axon. During repolarization, K+ flows out of the axon along its concentration gradient. Resting membrane potential is primarily established by the Na+/K+ pump.
What terms denotes a sudden change (depolarization and repolarization) in the electrical properties of the neuron membrane? Action potential Synaptic transmission Event-related potential Postsynaptic potential ------------------------------------ You step on a brick, ouch. What type of nerve will bring the signal from your foot to your brain? Somatic afferent Somatic efferent automatic afferent automatic afferent ---------------------------------------------- A given neurotransmitter is inhibitory. What might its receptors do? Allow positive ions to enter the cell Allow negative ions to enter the cell Allow positive ions to leave the cell B and C
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:
Which of the following would most likely occur if you experimentally depolarise the middle of an axon to threshold using an electronic probe? Question 24 options: an action potential will be initiated and proceed only in the normal direction toward the axon terminal no action potential will be initiated an action potential will be initiated and proceed only back toward the axon hillock two action potentials will be initiated and will proceed in opposite directions
Which statement is TRUE about the synapse? Neurotransmitters shuttle the signal back and forth between the pre- and post-synaptic cell. The pre-synaptic cell and post-synaptic cell are in direct contact, allowing the electrical signal to seamlessly flow from one to the other. The action potential jumps from the pre-synaptic cell into the post-synaptic cell. The action potential ends in the pre-synaptic cell and neurotransmitters carry the signal across the synaptic cleft to the post-synaptic cell.