0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What is the difference between presynaptic and postsynaptic neurons?
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).
What part of the neuron sends information to others?
Presynaptic neuron sends postsynaptic receives
What are characteristics of neurotransmitters?
Neurotransmitters are released in response to stimulation. They alter the physiology of the postsynaptic cell. They are synthesized by a presynaptic neuron. They bind to specific receptors on the postsynaptic cell.
How does neurotransmitters initiate depolarization?
Let's picture a presynaptic neuron, a synaptic cleft, and a postsynaptic neuron. An action potential reaches the terminal of a presynaptic neurone and triggers an opening of Ca ions enters into the depolarized terminal. This influx of Ca ions causes the presynaptic vesicles to fuse with the presynaptic membrane. This releases the neurotransmitters into the synaptic cleft. The neurotransmitters diffuse through the synaptic cleft and bind to specific postsynaptic membrane receptors. This binding changes the receptors into a ion channel that allows cations like Na to enter into the postsynaptic neuron. As Na enters the postsynaptic membrane, it begins to depolarize and an action potential is generated.
When two or more presynaptic neurons synapse with a single postsynaptic neuron in the CNS what pathway is formed?
Divergent
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
The sites where a chemical substance is transmitted from the presynaptic terminal of an axon to the postsynaptic membrane of a muscle fiber are called?
neuromuscular junctions
When nerve impulses from several presynaptic neurons stimulate a single postsynaptic neuron at the same time it is called?
chemical synapse
What is the difference between EPSP and an IPSP?
An EPSP is an excitatory postsynaptic potential, which represent input coming from excitatory cells, whereas an inhibitory postsynaptic potential represents input driven by inhibitory presynaptic cells.
These lipid molecules may function as retrograde neurotransmitters and allow the postsynaptic neuron to decrease release of neurotransmitter from the presynaptic neuron?
endocannabinoids
Which neural circuit enables a single presynaptic stimulation to cause a postsynaptic cell to send a series of impulses?
Diverging Circuit
Where are the receptors for neurotransmitters located?
Receptors for the various neurotransmitters are located on both the presynaptic and postsynaptic nerve terminals of the neuron.
