0
The signal to excite a muscle cell must cross the neuromuscular junction by the diffusion of acetylcholine across the?
Wiki User
∙ 11y ago
synaptic cleft
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
The chemical that transmits the signal across the neuromuscular junction is called?
Acetylcholine
How does the neural signal get across the neuromuscular junction?
a neurotransmitter chemical crosses the junction.
What part of nerve cell is adjacent to neuromuscular junction?
The axon terminal of a nerve cell is adjacent to the neuromuscular junction. The axon terminal releases neurotransmitters that transmit signals across the synapse to the muscle fiber. This signal triggers muscle contraction.
Why is ''botox'' an effective anti-wrinkle treatment.describe its mechanism of action with reference to the neuromuscular junction?
"Botox" is actually a poison. It prevents muscle movement by preventing the nerve impulse to travel from the neuron across the neuromuscular junction and prevents the muscle from contracting. It is the toxin produced by the microbe that causes botulism.
What two functions do acetylcholine perform?
Along with dopamine, serotonin and norepinephrine, acetylcholine is a neural transmitter. Some substances act as mediators and others, including acetylcholine, simulate or active the next nerve cell as impulses pass down the a nerve. Once it has performed this action by passing across the synapse (neural junction between two nerve cells) it is broken down by an enzyme called acetylcholine esterase into an acetyl group and choline. Acetylcholine also passes across the neural muscular junction, similar to the synapse between neurons (nerve cells) and also between nerve endings and muscle cells stimulating them and thus causing your muscles to move. Acetylcholine is also involved in memory and learning and is in particularly short supply in people with Alzheimer's disease. A recently released drug helps Alzheimers sufferers by inhibiting the action of acetylcholine esterase.
The chemical that transmits the signal across the neuromuscular junction is called?
Acetylcholine
How does the neural signal get across the neuromuscular junction?
a neurotransmitter chemical crosses the junction.
What potential motor end plate to synapse to acetylcholine synaptic cleft to special receptors on the skeletal muscle to action potential across the muscle travels down t-tubule to the what?
This is the neuromuscular junction. The action potential travels down the presynaptic motor neuron, releasing acetylcholine (ACh), which cross the synapse (neuromuscular junction), to bind to receptors on the end plate of muscle fibers, which induces depolarization, causing the muscle to contract.
What are the names of some common neurotransmitters?
Acetylcholine or aka ACH is the neurotransmitter that is released from the axon terminal to through the neuromuscular junction across the synaptic cleft which binds to the ACH receptors on the end motor plate of the Sarcolema.
Movement of arms and legs what major neurotransmitter involved?
Skeletal muscles move via action potential that is conducted by axons to the neuromuscular junction and across the synaptic gaps of efferent motor neurons. The main neurotransmitter responsible for this job is acetylcholine.
What part of nerve cell is adjacent to neuromuscular junction?
The axon terminal of a nerve cell is adjacent to the neuromuscular junction. The axon terminal releases neurotransmitters that transmit signals across the synapse to the muscle fiber. This signal triggers muscle contraction.
Why is ''botox'' an effective anti-wrinkle treatment.describe its mechanism of action with reference to the neuromuscular junction?
"Botox" is actually a poison. It prevents muscle movement by preventing the nerve impulse to travel from the neuron across the neuromuscular junction and prevents the muscle from contracting. It is the toxin produced by the microbe that causes botulism.
How is diffusion used when cells remove carbon dioxide?
Carbon dioxide moves out of the cells from a higher to lower concentration across the cell membrane. Then the CO2 moves through the capillary wall across the diffusion gradient. The diffusion process is repeated at the capillary/alveolar junction.
At what junction do nerves contact skeletal muscle fibers?
Motor neurons meet the muscle cells at neuromuscular junctions. Neurotransmitters are passed from the nerve across a synaptic cleft to the muscle to make it contract. Any damage to this nerve will mean that those cells will not contract (move).
Starting with the release of acetylcholine what are the steps in muscle contraction?
Acetylcholine released by the motor neuron at the neuromuscular junction changes the permeability of the cell membrane at the motor end plate. The permeability change allows the influx of positive charge, which triggers an action potential. The action potential spreads across the entire surface of the muscle fiber and into the interior via T tubules. The cytoplasmic concentration of calcium ions (released from the sarcoplasmic reticulum) increases, triggering the start of a contraction. The contraction ends when AChE removes the ACh from the synaptic cleft and motor end plat
What is the function of a presynaptic terminal?
It stores neurotransmitters and release its content across synaptic cleft
What two functions do acetylcholine perform?
Along with dopamine, serotonin and norepinephrine, acetylcholine is a neural transmitter. Some substances act as mediators and others, including acetylcholine, simulate or active the next nerve cell as impulses pass down the a nerve. Once it has performed this action by passing across the synapse (neural junction between two nerve cells) it is broken down by an enzyme called acetylcholine esterase into an acetyl group and choline. Acetylcholine also passes across the neural muscular junction, similar to the synapse between neurons (nerve cells) and also between nerve endings and muscle cells stimulating them and thus causing your muscles to move. Acetylcholine is also involved in memory and learning and is in particularly short supply in people with Alzheimer's disease. A recently released drug helps Alzheimers sufferers by inhibiting the action of acetylcholine esterase.
