physiology
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| show | Neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron.
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| show | A large-diameter neuron with myelin
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| Acetylcholine is in the same class of neurotransmitters as: Group of answer choices serotonin. histamine. dopamine. none of the above. | show 🗑
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| show | the frequency of nerve impulses.
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| show | catecholamines.
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| The fastest nerve fibers in the body can conduct an impulse that is how much faster than the slowest fibers in the body? Group of answer choices Almost 50 times faster Almost 100 times faster Almost 300 times faster Almost 500 times faster | show 🗑
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| show | Phenelzine
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| show | amine neurotransmitter.
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| show | All of the above are used by the body as neurotransmitters.
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| show | The outside of the plasma membrane is negatively charged, and the inside is positively charged.
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| A synapse consists of: a synaptic knob. a synaptic cleft. the plasma membrane of a postsynaptic neuron. all of the above. | show 🗑
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| show | axon
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| show | negative
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| show | 130???
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| Severe depression can be caused by a deficit in certain brain synapses of: acetylcholine. amines. amino acids. neuropeptides. | show 🗑
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| show | some of the sodium channels at the point of stimuli
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| During a relative refractory period: the action potential cannot be initiated. a resting potential exists. the cell membrane is impermeable to Na+ and K+. the action potential can be initiated with a strong stimulus. | show 🗑
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| show | saltatory conduction.
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| show | initiate an action potential.
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| A slight shift away from the resting membrane potentials in a specific region of the plasma membrane is called a _____ potential. membrane resting membrane local None of the above is correct. | show 🗑
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| No impulse can be sent through a neuron: during the relative refractory period. when the charge of the neuron is –70. during the absolute refractory period. when the stimulus is too strong. | show 🗑
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| show | receptors on the postsynaptic neuron.
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| show | potassium.
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| Which of the following is not one of the main chemical classes of neurotransmitters? Triglycerides Amines Amino acids Neuropeptides | show 🗑
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| For a neurotransmitter to produce an inhibitory postsynaptic potential, which of the following channels must open? Sodium and potassium channels Potassium and/or chloride channels Sodium and chloride channels Only the sodium channels | show 🗑
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| show | chemical transmitters are released.
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| Whats true of a neuron with a resting potential? cell membrane is permeable to Na+ but impermeable to K+ ions outer surface of the plasma membrane has a negative charge highest concentration of K+ is extracellular sodium pump has moved Na+ to the out | show 🗑
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| show | all of the above are correct
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| The neurotransmitter(s) that inhibit(s) the conduction of pain impulses is(are): acetylcholine. enkephalins. dopamine. norepinephrine. | show 🗑
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| Stimulus-gated channels open in response to: sensory stimuli. the influx of potassium. hyperpolarization. both A and B. | show 🗑
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Created by:
destinyyrobinson