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Acetylcholinesterase is an enzyme that breaks down acetylcholine into choline and acetate at the neuromuscular junction. This prevents acetylcholine from accumulating and allows for efficient signaling between the nerve cell and the muscle cell.

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1y ago

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What does ach do at a neuromuscular junction?

ACh (acetylcholine) binds to receptors at the NMJ (neuromuscular junction) to induce contraction of muscle.


After nervous stimulation stops what prevents ACh in the synaptic cleft from continuing to stimulate contraction?

Acetylcholinesterase destroying the ACH


What is a sustained muscle contraction?

Occurs when acetylcholine (ACh) accumulates in the neuromuscular junction. It is called a tetanic contraction.


Botulin blocks the release of ACh. Botulin is best described as a(n)?

Botulin is best described as a neurotoxin that inhibits the release of acetylcholine (ACh) at the neuromuscular junction, leading to muscle paralysis.


What are the neurotransmitter released by the neuromuscular junction resulting in depolarization?

The primary neurotransmitter released at the neuromuscular junction is acetylcholine (ACh). When a motor neuron releases ACh, it binds to receptors on the muscle cell membrane, leading to depolarization of the muscle fiber. This depolarization initiates an action potential, resulting in muscle contraction. Additionally, the enzyme acetylcholinesterase breaks down ACh in the synaptic cleft to terminate the signal.


What neurotransmitter is found at the synapse between nerves and human skeletal muscle cells?

Acetylcholine is the neurotransmitter at the neuromuscular junction.


In a neuromuscular junction synaptic vesicles in the motor neuron contain which neurotransmitter In a neuromuscular junction synaptic vesicles in the motor neuron contain which neurotransmitter?

In a neuromuscular junction, synaptic vesicles in the motor neuron contain the neurotransmitter acetylcholine (ACh). When an action potential reaches the motor neuron, ACh is released into the synaptic cleft and binds to receptors on the muscle fiber, leading to muscle contraction.


Where are ACh receptors found in the body?

At every junction between a motor neuron and skeletal muscle fibers


Succinylcholine acts as a depolarizing agent that prevents repolarization of the nerve. Name a site within the neuromuscular junction that might be affected to prevent the muscle contraction?

The nicotinic acetylcholine receptor (nAChR) on the post-synaptic muscle membrane is the site within the neuromuscular junction affected by succinylcholine. By binding to and activating these receptors, succinylcholine causes sustained depolarization and prevents repolarization, leading to muscle paralysis.


What neurotransmitter is released at the neuromuscular junction?

Acetylcholine is the primary neurotransmitter released at the neuromuscular junction. It is responsible for transmitting signals from motor neurons to muscle fibers, leading to muscle contraction.


Synaptic vesicles at the neuromuscular junction contain?

Synaptic vesicles at the neuromuscular junction contain the neurotransmitter acetylcholine (ACh). When an action potential reaches the nerve terminal, these vesicles fuse with the presynaptic membrane and release ACh into the synaptic cleft. This release initiates muscle contraction by binding to receptors on the postsynaptic membrane of the muscle fiber, leading to depolarization and subsequent muscle activation.


Inhibition of acetylcholinesterase by poisoning blocks neurotransmission at the neuromuscular junction because?

ACh is not degraded, therefore, prolonged depolorization is enforced on the post synaptic memebrane