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Chapter 19

Nerve signaling

QuestionAnswer
Define resting membrane protentional (RMP) RMP is the electrical potential (energy needed) difference across a cell's membrane when it is in a nonexcited state
What is the function of the sodium-potassium pump? It transports sodium and potassium ions in different directions at different rates
What is the difference between depolarization and hyperpolarization? Depolarization is the movement of the membrane potential towards zero while hyperpolarization is the movement away from zero.
List the 1st step of the production of an Action potential: Stimulus-gated Na+ channels open and allow inward Na+ diffusion, leading to depolarization
What is the name of the period where the membrane does not react to stimulus and how long is it? The absolute refractory period and it lasts 0.5 ms
Name and define the types of synapse? Electrical synapses are formed when two cells join end to end by gap junctions. Chemical synapses occur when a neurotransmitter sends a signal from a synaptic cell to a postsynaptic cell
What are the 4 main small-molecule transmitter classes? Class I acetylcholine, class II amines, class III amino acids, class IV other small molecules
Name the process that occurs when more than one presynaptic axon synapses with a single postsynaptic neuron? Convergence
Name the process that occurs when the effects of several knobs activate simultaneously to produce an action potential? Spatial summation
True or false: amines are considered the most common neurotransmitter of the CNS? False, amino acids are the most common
Created by: Quanteesia
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