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Philiycia Cathcart

Week 7 Ligand gated ion channels

QuestionAnswer
The action potential seems to "leap" from node to node along a myelinated fiber. This type of impulse regeneration is called ____conduction saltatory
A term commonly used as a synonym for action potential is nerve impulse
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
Which chemicals allow neurons to communicate with one another? neurotransmitters
The brief period which a local area of an axon's membrane resist re-stimulation is called the_______ period. refractory
which membrane receptors acts to directly change ion permeability when stimulated? Gated-channel receptor
The tiny bulge at the end of the terminal branch of a presynaptic neuron's axon is called a____. synaptic knob
The difference between sodium and potassium in the generation of action potential is that sodium causes depolarization of the cell membrane. and potassium repolarization of the cell membrane
Neurons are the only living cells that maintain a difference in the concentration of ions across their membrane false
If the magnitude of the local depolarization surpasses a limit called the ___, voltage-gated Na+ channels are stimulated to open threshold potential
movement of the membrane potential away from zero (below the usual RMP) is called hyperpolarization
The speed of a nerve impulse depends on the neurons resting potential false
The two types of synapse the electrical synapses and the _____ synapse. chemical
An ion channel that opens in response to a sensory stimulus is an stimulus gated channel
The mechanisms that produce and maintain the resting membrane potential do so by producing a slight excess of positive ions on the outer surface of the plasma membrane
Created by: philiycia1
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