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Stimulation of a postsynaptic neuron by many terminals at the same time?
Wiki User
∙ 12y ago
Spatial summation
Wiki User
∙ 12y ago
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Do neurotransmitters always cause hyperpolarization of the postsynaptic membrane?
No, many neurotransmitters cause the postsynaptic membrane to be depolarized.
What is The process of adding the effects of many postsynaptic potentials?
summation
How many axons does each neuron have?
Most neurons contain one axon. There have never been more than one found. However, some neurons contain no axon at all.
What proteins does a neuron make?
A molecule is many order of magnitude smaller than a neuron. A neuron is made of molecules not the other way around.
Functions of synapse?
unidirectional transmissionSignals pass from presynaptic to postsynaptic neurone since: synaptic vesicles are only found in presynaptic neurone and receptors for neurotransmitter are only found in postsynaptic neurone.intterconnection between nerve pathwaysOne neurone may receive signal from many synapses from different presnaptic neurones. This allows a wide range of actions in response to a stimulus.memory and learningNeurones involved are linked by new synapses.
EPSPs produced by many different presynaptic fibers converging on a single postsynaptic neuron causing summation on the postsynaptic dendrites and cell body best describes?
spatial summation
Do neurotransmitters always cause hyperpolarization of the postsynaptic membrane?
No, many neurotransmitters cause the postsynaptic membrane to be depolarized.
What is The process of adding the effects of many postsynaptic potentials?
summation
How many axons does each neuron have?
Most neurons contain one axon. There have never been more than one found. However, some neurons contain no axon at all.
What type of neuron has many dendrites?
multipolar neuron
Does information enter a neuron through the axon?
The different ion concentrations on the inside and outside of the cell membrane create a certain electric potential around the cell (just by being there with their charge). A strong enough change in the concentrations can cause certain ion channel proteins in the membrane to open all at once, allowing certain ions to massively diffuse through the membrane and thereby rapidly changing the potential. When a certain potential is reached, these channels will begin to close again and different potential-controlled channels will open, allowing a different kind of ions to move through the membrane and returning the membrane potential back to the previous state. Again through diffusion the now changed ion concentrations will trigger these so-called action potentials in nearby membrane regions, carrying the stimulation along the neuron's axon to the next neuron.
How does the end plate potential differ from a EPSP on a post synaptic cell?
End plate potential is the change in potential from neurotransmitters. It can be excitatory or inhibitory. If the action potential wants to continue, it will be excitatory and vice versa. It can be additive, if more action potentials are fired it will increase the end plate potential. An action potential is an all or none response. It will either proceed or it will not proceed depending on the terms of the threshold. It cannot be additive, because there is an absolute refractory period where no additional action potentials can be fired.
What is the difference between the way excitatory and inhibitory transmitters work?
As a rule more than one presynaptic action potential is needed to fire the postsynaptic neuron or muscle so that the trigger to initiate an action potential are either many subthreshold local potentials from different sources or from the same neuron received within a short period of time. The first case is called spatial summation and the second case is called temporal summation. Whether a postsynaptic potential (another term for a local potential) is excitatory or inhibitory depends on what ion channels are affected by the transmitter released from the presynaptic vesicles.
How many terminals does Heathrow currently have?
Heathrow has two terminals
How many terminals at Bangkok international airport?
Only 2 terminals
How many terminals are in the Alaska Marine Highway System?
The AMHS has 32 terminals.
What proteins does a neuron make?
A molecule is many order of magnitude smaller than a neuron. A neuron is made of molecules not the other way around.
