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When a neuron responds to a particular neurotransmitter by opening gated ion channels the neurotransmitter is serving as which part of the signal pathway?
Wiki User
∙ 12y ago
Signal Molecule
Synaptic transmission is when it moves across the synaptic gap, and it then just binds to the receptor on the other side.
Wiki User
∙ 12y ago
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What is happening to voltage-gated channels at this point in the action potential?
Na+ channels are inactivating, and K+ channels are opening.
Depolarization of the nerve membrane begins with?
opening of sodium channels
What is the first step for nerve impulse generation?
See my answer for What_type_of_signal_is_taking_place_during_neuron_to_neuron_communication
What effect does the opening of the potassium channels have on the charge difference across the neuron's membrane?
repolarization
What is the fast rising phase of the SA node action potential is due to?
opening of slow calcium channels
What neurotransmitter control the somatic nervous system and how does it work?
Acetylcholine (ACh) is the only neurotransmitter used in the motor division of the somatic nervous system. It works by binding to acetylcholine receptors on skeletal muscle fibers and opening ligand-gated sodium channels in the cell membrane.
What neurotransmitter controls the somatic nervous system how does it work?
Acetylcholine (ACh) is the only neurotransmitter used in the motor division of the somatic nervous system. It works by binding to acetylcholine receptors on skeletal muscle fibers and opening ligand-gated sodium channels in the cell membrane.
What is the process of a neurotransmitter being absorbed into the axon terminal?
When an action potential reaches the axon terminal, it triggers the opening of voltage-gated calcium channels. Calcium ions enter the axon terminal, leading to the fusion of neurotransmitter-containing vesicles with the synaptic membrane. The neurotransmitter is then released into the synaptic cleft where it can bind to receptors on the postsynaptic neuron.
What is happening to voltage-gated channels at this point in the action potential?
Na+ channels are inactivating, and K+ channels are opening.
What is happening to the voltage gated channels at this point in the action potential?
Na+ channels are inactivating, and K+ channels are opening.
What is the conducting unit of the nerve tissue?
The axon is the conducting part of the neuron. It conducts the impulse from the cell body to the terminals, where ion channels open in response to the impulse, mediators are activated, neurotransmitter crosses synapse and attaches at the post-synaptic membrane, opening the ion channels there and depolarizing the cell, and propagating the impulse towards another cell body via the post-synaptic cell's axon.
Opening of these channels leads to what of the motor endplate?
Depolarization
Opening of sodium channels in the membrane of a neuron results in?
depolarization.
Depolarization of the nerve membrane begins with?
opening of sodium channels
Why are G-protein-gated ion channels called the shortcut pathway?
All action of neurotransmitter is eventually (mostly) manifest in the regulation of ion in nerve cell, to decide when to fire or not an action potential. Regulation of ion utilize the ion channel, and there are three (known) mechanism which affect the opening and closing of an ion channel : 1) direct influence - ion channel which is directly activated by neurotransmitter attached to them, this one is called ¨Transmitter Gated Channel¨ 2) shortcut pathways - ion channel which is activated by G-protein, this is called the ¨G-protein-gated ion channels¨ 3) second messenger cascades - G-protein trigger a chain reaction of chemical through enzyme or other class of protein and finally affect the opening and closing of ion channels
What type of ion channel opening is caused by the binding of neurotransmitters to the receptors on the motor endplate?
Sodium enters the cell and causes depolarization. A small amount of potassium also leaves the motor end plate. This means binding of the neurotransmitter causes chemically gated sodium channels to open in the motor end plate.calcium
What effect does the opening of the potassium channels have on the charge difference across the neuron's membrane?
repolarization
