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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?
Wiki User
∙ 10y ago
neuromuscular junctions
Wiki User
∙ 10y ago
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. At these junctions, the neurotransmitter acetylcholine is released from the presynaptic terminal and binds to receptors on the postsynaptic membrane, initiating muscle contraction.
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When nerve impulses from several presynaptic neurons stimulate a single postsynaptic neuron at the same time it is called?
chemical synapse
What are neurotransmitters for postsynaptic neuron?
Neurotransmitters are chemical messengers that transmit signals and information from the presynaptic neuron to the postsynaptic neuron at the synapse. They bind to receptors on the postsynaptic neuron, leading to changes in its membrane potential and triggering a new signal to be passed along the neural pathway. Some common neurotransmitters include acetylcholine, dopamine, serotonin, and glutamate.
What accomplishes the transmission of the nerve signal across the synapse?
Neurotransmitters are released from the presynaptic neuron and cross the synaptic cleft to bind to receptors on the postsynaptic neuron, allowing the nerve signal to be transmitted. This process enables the electrical signal in the presynaptic neuron to be converted into a chemical signal in the synaptic cleft and then back into an electrical signal in the postsynaptic neuron.
What is a junction or point of close contact between neuron?
A junction or point of close contact between neurons is called a synapse. It is where electrical or chemical signals are transmitted from one neuron to another. Neurotransmitters are released from the presynaptic neuron to the postsynaptic neuron to carry out this communication.
What bridges the gap between a neuron sending a message and the neuron receiving it?
Neurotransmitters are chemical messengers that bridge the gap, known as the synaptic cleft, between a neuron sending a message (presynaptic neuron) and the neuron receiving it (postsynaptic neuron). These neurotransmitters are released from the presynaptic neuron in response to an electrical signal and bind to receptors on the postsynaptic neuron, causing changes in its electrical activity.
What is a presynaptic neuron?
a neuron from the axon terminal of which an electrical impulse is transmitted across a synaptic cleft to the cell body or one or more dendrites of a postsynaptic neuron by the release of a chemical neurotransmitter.
When nerve impulses from several presynaptic neurons stimulate a single postsynaptic neuron at the same time it is called?
chemical synapse
What are neurotransmitters for postsynaptic neuron?
Neurotransmitters are chemical messengers that transmit signals and information from the presynaptic neuron to the postsynaptic neuron at the synapse. They bind to receptors on the postsynaptic neuron, leading to changes in its membrane potential and triggering a new signal to be passed along the neural pathway. Some common neurotransmitters include acetylcholine, dopamine, serotonin, and glutamate.
What accomplishes the transmission of the nerve signal across the synapse?
Neurotransmitters are released from the presynaptic neuron and cross the synaptic cleft to bind to receptors on the postsynaptic neuron, allowing the nerve signal to be transmitted. This process enables the electrical signal in the presynaptic neuron to be converted into a chemical signal in the synaptic cleft and then back into an electrical signal in the postsynaptic neuron.
What is a junction or point of close contact between neuron?
A junction or point of close contact between neurons is called a synapse. It is where electrical or chemical signals are transmitted from one neuron to another. Neurotransmitters are released from the presynaptic neuron to the postsynaptic neuron to carry out this communication.
What is the space between neurons across which chemical messages pass?
The space between neurons is called the synaptic cleft. It is where neurotransmitters are released by the presynaptic neuron, travel across the cleft, and bind to receptors on the postsynaptic neuron to transmit chemical messages.
How does an impulse travel from a presynaptic neuron to a postsynaptic neuron?
When the action potential reaches the button(axon terminal) of the presynaptic neuron the depolarization causes voltage gated calcium channels to open increasing intracellular calcium content. This causes synaptic vesicles to fuse to the membrane and release neurotransmitters that bind to the post synaptic neuron and create a chemical action potential.
Why conduction at synapses is always one-way?
Conduction at synapses is one-way because of the organization of the presynaptic and postsynaptic neurons. Neurotransmitters are released from the presynaptic neuron and received by the postsynaptic neuron, allowing communication to occur in a specific direction. This one-way flow ensures that signals are transmitted efficiently and accurately in the nervous system.
What bridges the gap between a neuron sending a message and the neuron receiving it?
Neurotransmitters are chemical messengers that bridge the gap, known as the synaptic cleft, between a neuron sending a message (presynaptic neuron) and the neuron receiving it (postsynaptic neuron). These neurotransmitters are released from the presynaptic neuron in response to an electrical signal and bind to receptors on the postsynaptic neuron, causing changes in its electrical activity.
What is the opening across which one neuron communicates with another neuron known as?
The opening across which one neuron communicates with another neuron is called a synapse. At the synapse, chemical signals called neurotransmitters are released from the presynaptic neuron, which then bind to receptors on the postsynaptic neuron to transmit the signal.
What is The purpose of axon?
As far as I understand it, the purpose of the axon is to transmit the electrical impulses (information) of the presynaptic dendrites away from the cell body. The axon therefore acts as a sort of barrier between the postsynaptic dendrites, as it is kind of a one-way street from the cell body to the postsynaptic dendrites. As for why this is necessary, I have no clue. I would assume that if electrical information were to get caught up and stuck somewhere in the cell that it might be damaging to the neuron itself. The purpose of the axon would ultimately be to get the electrical information from the cell body to the postsynaptic dendrites so that chemical production on the neurotransmitter takes place.
Can you briefly describe the events that occur when a nerve impulse arrived at a synapse?
A synapse is a junction where two nerves meets. when action potential reaches a synapse, the pores open allowing an afflux of calcium ions into presynaptic terminal. this causes neuro transmitters to be released and cross over the synaptic cleft to attach to receptors in the post synaptic membrane and allow impulse to pass.
