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Acetylcholine (ACh) is a neurotransmitter that plays a crucial role in muscle movement by transmitting signals from motor neurons to muscle fibers at the neuromuscular junction. When ACh is released, it binds to receptors on the muscle cell membrane, leading to depolarization and the initiation of an action potential. This action potential triggers a series of events that result in muscle contraction. Thus, ACh is essential for coordinating voluntary muscle movements.
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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.
How does destruction of Ach receptors on the sarcolemma effect muscle contraction?
The destruction of acetylcholine (ACh) receptors on the sarcolemma impairs muscle contraction by preventing effective communication between motor neurons and muscle fibers. When ACh is released from motor neurons, it binds to these receptors to initiate the depolarization of the muscle cell membrane, leading to contraction. Without sufficient ACh receptors, the muscle fibers cannot respond adequately to the neurotransmitter, resulting in weakened or absent muscle contractions. This is a characteristic feature of conditions like myasthenia gravis.
What enzyme removes ACh from receptors so stimulation of muscle cells cease?
ACh esterase, which breaks ACh down into an acetyl group and a choline group. This is then taken up by the neurone and some is reformed into ACh.
What chemical stimulates muscle contraction?
acetylcholine (ACh)
What is the chemical used at the junction with a skeletal muscle?
The chemical used at the junction with a skeletal muscle is acetylcholine (ACh). It is released from the motor neuron at the neuromuscular junction and binds to receptors on the muscle fiber's membrane, triggering muscle contraction. This process is essential for voluntary movement and is part of the overall neuromuscular signaling mechanism.
What chemical into the muscle cell membrane causes a temporary rush?
Acetylcholine (ACh)
Which of 2 chemicals listed would be good skeletal muscle relaxant and why chemical A binds to and blocks ACh receptors of muscle cells and Chemical B floods the muscle cells cytoplasm with CA2 plus?
Chemical A would be the best muscle relaxant. Since the muscle relies on ACH as a stimulant, this chemical would inhibit communication between the muscle cell and the neuron thus making it not contract. While Chemical B would cause further contraction of the muscle since calcium is needed to help the myosin head to attach to the actin filliment which creates muscle contraction.
What is the purpose of muscle cells?
The purpose of the muscle cell is movement, support, help the heart pump and to heart and warmth\ by H.L
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 fibers release ach?
Cholinergic fibers release acetylcholine (ACh) at their synapses to transmit signals to target cells, including muscle cells, gland cells, and other neurons. This neurotransmitter is vital in the functioning of the parasympathetic nervous system and at neuromuscular junctions for muscle contraction.
What neurotransmitter is found at the synapse between nerves and human skeletal muscle cells?
Acetylcholine is the neurotransmitter at the neuromuscular junction.
After ACh attaches to its receptors at the neuromuscular junction the next step is?
If enough ACh is released, the sarcolemma at that point becomes temorarily more permeable to sodium ions, which rush into the muscle cell and to potassium ions which diffuse out of the cell. Although more sodium ions enter than posassium ions leave.
