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Which ion no longer influxes into the muscle fiber when acetylcholine is degraded?
Wiki User
∙ 10y ago
calcium
Wiki User
∙ 10y ago
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What prevents acetylcholine from accumulating in the neuromuscular junction?
The presence of an enzyme called acetylcholinesterasethat degrades acetylcholine is what prevents an accumulation of the neurotransmitter and sustained muscle contraction. Acetylcholinesterase is an enzyme that can be found within the neuromuscular junction. Thus, when a nerve impulse causes the release of acetylcholine at the neuromuscular junction, there is a critical time in which the neurotransmitter can bind to receptors on the muscle before it is degraded.
What chemical stimulates muscle contraction?
acetylcholine (ACh)
What type of excitatory neurotransmitter is secreted by motor neurons innervating skeletal muscle?
Acetylcholine is the excitatory neurotransmitter released by neurons innervating skeletal muscles. Acetylcholine release stimulates muscle contraction by acting at the nicotinic-acetylcholine receptor on the surface of the muscle cell.
What is the consequences of the administration of a compound that inhibits acetylcholinesterases?
If the action of acetylcholinesterase is inhibited, acetylcholine is not degraded and would accumulate in the synaptic cleft and act as a constant stimulus to the muscle fiber. The muscle cells will continue to contract resulting in a condition called spastic paralysis.
What is released to muscle cell receptors to trigger muscle contractions?
Acetylcholine
Is acetylcholine stimulatory to cardiac muscle?
False
What is the neurotransmitter of alpha-motor neuron?
Alpha-Motor neurons release the neurotransmitter acetylcholine at a synapse called the neuromuscular junction. When the acetylcholine binds to acetylcholine receptors on the muscle fiber, an action potential is propagated along the muscle fiber in both directions.
What is the chemical transmitter released at the neuromuscular junction?
The neurotransmitter acetylcholine is released into the synaptic cleft to bind with receptors on muscle cells. Upon binding, the muscle cells contract.
What neurotransmitter stimulates skeletal muscle contractions?
Acetylcholine
What is the substance that halts stimulation of muscle tissue?
Acetylcholine
What neurotransmitter causes muscle movement?
Acetylcholine
What can acetylcholine and norepinephrine affect?
Smooth Muscle Cells
