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What is the difference between presynaptic and postsynaptic neurons?
Wiki User
∙ 9y ago
Presynaptic neurons release the neurotransmitter in response to an action potential. Postsynaptic neurons receive the neurotransmitter (and can however become presynaptic to the next nerve cell, if the neurotransmitter has stimulated the cell enough).
Wiki User
∙ 9y ago
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When two or more presynaptic neurons synapse with a single postsynaptic neuron in the CNS what pathway is formed?
Divergent
When nerve impulses from several presynaptic neurons stimulate a single postsynaptic neuron at the same time it is called?
chemical synapse
What is an event when one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single ESPS?
temporal summation
How is information sent from one neuron to the next?
Neurons have specialized projections called dendrites and axons. Dendrites bring information to the cell body and axons take information away from the cell body. Information from one neuron flows to another neuron across a synapse. The synapse contains a small gap separating neurons. The synapse consists of: 1. a presynaptic ending that contains neurotransmitters, mitochondria and other cell organelles, 2. a postsynaptic ending that contains receptor sites for neurotransmitters and, 3. a synaptic cleft or space between the presynaptic and postsynaptic endings.
Describe the structure of a synapse?
The synapse consists of two main parts that allow one neuron to communicate with another: 1) the presynaptic terminal located at the end of an axon; and 2) the postsynaptic terminal located on the dendrite of another neuron. The presynaptic terminal is where neurotransmitters are stored and released from. The postsynaptic terminal is the recipient side of the synapse. Neurotransmitters released from the presynaptic terminal will diffuse across the synaptic cleft and bind to receptors located on the surface of dendritic spines.
A postsynaptic potential is a graded potential that is the result of a neurotransmitter released into the synapse between two neurons?
true
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.
When is acetycholine released?
acetylcholine is released from presynaptic neurons in response to a nerve impulse
Explain what happens to neurotransmitters after they are released?
After neurotransmitters are released in to the synaptic cleft - from the presynaptic neuron, they bind with there specific receptor cites found on the postsynaptic neurons cell membrane. Some neurotransmitters then become inactive by enzymes whiles other simply drift away from the synaptic cleft. Reuptake can also occur where the presynaptic neuron sponges up (or takes back) the remaining neurotransmitters left behind.
What neurotransmitter does Prozac affect?
Prozac (fluoxetine) is an SSRI (selective serotonin reuptake inhibitor). It targets reuptake channels for the neurotransmitter serotonin, preventing serotonin from reentering the presynaptic neurons to be removed from the synaptic cleft, thus forcing an accumulation of serotonin and repeated triggering of the serotonin "signal" in the postsynaptic neurons.
What increases the amount of information a neuron can receive?
There are different types of receptors, which allow neurons to receive information. In nose you have chemoreceptors. In eyes you have photoreceptor. In the ears you have hair cells of different length, which resonates with sounds of different frequency. On the surface of the tongue you have again chemoreceptors. In the skin you have different types of receptors to give you information like heat, cold, pain, touch and vibration sense.
What is the difference between somatic sensory neurons and visceral sensory neurons?
your face and your face
