The reason why action potentials are described as "all or none" is: a. because neurotransmitter is...
The reason why action potentials are described as "all or none" is:
a. because neurotransmitter is released from all axon terminals or none of them.
b. an action potential arriving at an axon terminal either causes all the neurotransmitters to be released or none to be released.
c. either all ion channels in the axon membrane open or none open.
d. if an action potential is generated in a neuron, the amplitude does not depend on the stimulus strength.
e. the rate of propagation of an action potential down an axon is independent on the stimulus strength.
Homework Answers
Answer
option D
Explanation:
- According to all or none event magnitude or amplitude of an action potential is do not depend on the stimulation strength if it reaches the threshold.
- The amplitude is constant for all action potential.
- Either the neuron will fires at its full amplitude or not at all.
- Example of all or non law: electrical excitation of muscle
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The reason why action potentials are described as "all or none"
is:
a. because neurotransmitter is...
If necessary, refer to Animation: Chemical Synapses. When an action potential reaches the axon terminal: sodium...
If necessary, refer to Animation: Chemical Synapses. When an action potential reaches the axon terminal: sodium ions are released from the axon terminal, enter the cell body of the postsynaptic neuron through its sodium channels, and may initiate an action potential in that neuron. neurotransmitter molecules are released from the axon terminal and bind to receptors on the postsynaptic neuron, causing either an inhibitory hyperpolarization or an excitatory depolarization. neurotransmitter molecules are released from the axon terminal, bind to and...
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Complete each sentence to assess your knowledge of
neurotransmitter storage and release at a typical neuronal
synapse.
Thank you!!!
Complete each sentence to assess your knowledge of neurotransmitter storage and release at a typical neuronal synapse, SNARE As action potentials propagate along a myelinated fiber, they jump from one node of Ranvier to the next and for this reason such propagation is called reuptake presynaptic Eventually, the action potential reaches the terminal of the neuron postsynaptic Depolarization in the terminat...
Question 2 1 pts Graded potentials are different than action potentials since graded potentials: can beelther...
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Compare and contrast graded potentials and action potentials, with particular attention to their locations in the...
Compare and contrast graded potentials and action potentials, with particular attention to their locations in the neuron and the ions and ion channels involved in each. Label a voltage-versus-time diagram of an action potential with the ions involved in each phase, the direction of their movement across the membrane, and the terms depolarize, repolarize, and hyperpolarize. Describe the physiological process involved in the conduction (propagation) 2 of an actic potential, including the types and locations of the ion channels involved....
QUESTION 8 he membrane potential becomes more negative than the resting potential during the after-hyperpolarization phase...
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QUESTION 35 Which of the following is NOT true regarding the propagation of action potentials O...
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ant Score: 10% Resources C Give Up? O Hint Check Answer of 10 Use the Action...
ant Score: 10% Resources C Give Up? O Hint Check Answer of 10 Use the Action Potential Transmission tab of the Membrane Potentials interactive to help you answer the question. What would happen to the action potential transmission if voltage-gated sodium (Na+) channels in the initial axon segment were abnormally far apart from one another? The action potential would propagate more quickly than normal because saltatory conduction enables the depolarization signal to jump between voltage-gated Na+ channels. The action potential...
Complete each sentence to assess your knowledge of
neurotransmitter storage and release at a typical neuronal
synapse.
Thank you!!!
Complete each sentence to assess your knowledge of neurotransmitter storage and release at a typical neuronal synapse, SNARE As action potentials propagate along a myelinated fiber, they jump from one node of Ranvier to the next and for this reason such propagation is called reuptake presynaptic Eventually, the action potential reaches the terminal of the neuron postsynaptic Depolarization in the terminat...
Question 2 1 pts Graded potentials are different than action potentials since graded potentials: can beelther depolarizing or hyperpolarizing while action potentials always hyperpolarizing O can be generated at the exposed areas of an axon while action potentials are only generated at the some of the Duron have the same strength no matter the intensity of the stimulus while action potentials vary in their strength (magnitude) with the intensity of the stimulus. Ocause the breakdown of neurotransmitters from a neuron...
Compare and contrast graded potentials and action potentials, with particular attention to their locations in the neuron and the ions and ion channels involved in each. Label a voltage-versus-time diagram of an action potential with the ions involved in each phase, the direction of their movement across the membrane, and the terms depolarize, repolarize, and hyperpolarize. Describe the physiological process involved in the conduction (propagation) 2 of an actic potential, including the types and locations of the ion channels involved....
QUESTION 8 he membrane potential becomes more negative than the resting potential during the after-hyperpolarization phase of the action potential (AHP) because Ligand-galed Nat channels are inactivated and cannot be opened Voltage-gated K channels become inactivated The K equilibrium potential is below the resting membrane potential All ofthe above. None of the above QUESTION 9 When an action potential reaches the axon terminal, release of neurotransmitter is triggered by... a. movement of sodium ions into the axon terminal b. movement...
Complete the following statements to summarize the role of neurotransmitters. Not all choices will be used. stimulus synaptic cleft Serotonin Acetylcholine synaptic division receptor released neurons synaptic vesicles signals Neurotransmitters transmit between neurons to organs, and from neurons to muscles. , from neurons to glands, from Because an action potential cannot cross the synapse between neurons, neurotransmitters aid in signaling between neurons. The neurotransmitter is by the sending neuron, where it has been stored in at the axon terminal. and...
QUESTION 35 Which of the following is NOT true regarding the propagation of action potentials O A. All of these statements are true B. The magnitude of the action potential stays the same as it travels down the axon. C. Voltage-gated Na+ channels open only when the threshold potential is reached. OD. Each segment of the axon prevents the adjacent segments from firing, E. The refractory period allows the impulse to travel in only one direction OF. None of these...
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ant Score: 10% Resources C Give Up? O Hint Check Answer of 10 Use the Action Potential Transmission tab of the Membrane Potentials interactive to help you answer the question. What would happen to the action potential transmission if voltage-gated sodium (Na+) channels in the initial axon segment were abnormally far apart from one another? The action potential would propagate more quickly than normal because saltatory conduction enables the depolarization signal to jump between voltage-gated Na+ channels. The action potential...
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