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When a neurotransmitter opens a chemically-gated channel does the neurotransmitter goes into the cell?
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When a sodium channel opens and sodium rushes into a myocyte the cell membrane becomes?
The cell becomes depolarized
What chemical acts like a key to a cell?
hormones such as insulin opens up channel proteins which are like doors to a cell. Channel proteins allow larger molecules, such as sugar, to enter the cell.
The effect of a neurotransmitter on the postsynaptic cell occurs when the neurotransmitter?
binds to specific receptors on postsynaptic cell membrane
What a neurotransmitter is?
A neurotransmitter is a chemical or peptide in synapses, usually between neurons, a neuron and muscle or a neuron and other organ. The neurotransmitter transmits information to and from and within the brain. When a neurotransmitter is released from the presynaptic cell in response to depolarization of the cell by an action potential, it diffuses across the synaptic cleft and binds a receptor or ligand-gated ion channel on the postsynaptic cell. Binding on the postsynaptic cell alters the resting potential of the postsynaptic cell in either an inhibitory or excitatory manner, making the cell less susceptible or more susceptible (respectively) to an action potential. Examples include, but are not limited to, acetylcholine, GABA, noradrenaline, serotonin and dopamine.
Why do glucose need insulin to enter cells?
Most cell membranes are NOT permeable to sugar unless insulin opens a channel.
Is histamine a neurotransmitter?
Histamine is a neurotransmitter produced by basophils (a type of white blood cell).
What mimic or enhance the effects of a neurotransmitter on the receptor sites of the next cell increasing or decreasing the activity of that cell?
agonists Chemical substances that mimic or enhance the effects of a neurotransmitter on the receptor sites of the next cell, increasing or decreasing the activity of that cell. Drug that enhances the effects of a particular neurotransmitter.
A chemical found in the synaptic vesicles that when released has an effect on the next cell is called a?
neurotransmitters
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 causes the receiving cell the fire?
Excitatory neurotransmitter
Compound that influences a postsynaptic cell's response to a neurotransmitter?
neuromodulator
What substances are secreted at the end of each nerve cell?
neurotransmitter
