Alpha motor neurons
The skeletal muscle is the only type of muscle which is voluntary.
i think its the brain...
It blocks the sodium channels that are required to create action potential in the muscles to make them contract.
Yes, nerve stimulation is necessary for skeletal muscles to contract. This stimulation causes an action potential to travel down the motor neuron, leading to the release of acetylcholine at the neuromuscular junction, which triggers muscle contraction by causing calcium release in the muscle fiber. Without this nerve input, skeletal muscles would not be able to contract voluntarily.
moving your arms,legs,fingers,etc.
The action potential is conducted into a skeletal muscle fiber by the depolarization of the motor end plate, which triggers the opening of voltage-gated sodium channels. This causes an influx of sodium ions into the muscle fiber, leading to depolarization and the initiation of muscle contraction.
The duration of action potential in skeletal muscle is typically around 2-4 milliseconds. This includes the depolarization phase (around 1-2 milliseconds) and repolarization phase (around 1-2 milliseconds).
the muscles near the veins help by their muscular contractions, they press on the vein and have a squeezing pumping action.
beta blockers
There are approximately 642 skeletal muscles within the typical human, and almost refers to the action of each muscle from the standard anatomical position.
The stimulus that travels from the motor neuron to skeletal muscle is an electrical signal called an action potential. This action potential causes the release of neurotransmitters, specifically acetylcholine, which then stimulates muscle contraction.
calcium increases the action potential transmitted along the scarcolemma