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Nerve signaling
physiology week 7
| Question | Answer |
|---|---|
| what mechanism quickly terminates the action of a neurotransmitter once it binds to its postsynaptic receptor? | Neurotransmitter molecules are metabolized into inactive compounds, neurotransmitter molecules are transported into nearby glial cells, neurotransmitter molecules are transported back into synaptic knobs. |
| A synapse can occur only between an axon and? | another axon, a dendrite, a cell body. |
| The sodium potassium pump actively pumps three potassium ions out of the neuron and two sodium ions into the neuron? | false |
| A neurologist is using a voltmeter to measure potential. The membrane potential of a neuron was recorded at +30mV. This is what type of membrane potential? | Action |
| In a myelinated fiber, the action potential jumps from one node of Ranvier to the next. | true |
| the brief period during which a local area of an axons membrane resists restimulation is called the ____ period? | refractory |
| movement of the membrane potential away from zero (below the usual RMP) is called the? | hyperpolarization |
| the difference in electrical charge between the inside and outside of a membrane is called the membrane potential | true |
| neurons are the only living cells that maintain a difference in the concentration of ions across their membrane | false |
| the speed of a nerve impulse depends on a neurons resting potential. | false |
Created by:
antonette88
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