Barcelona is the only club to play in each champion league each year, no other club has done it , since it started in 1950. But they have won only three champion league cups. â¦   Fc Barcelona has won the champions league 3 times! Making the world better, one answer at a time.
Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Skeletal muscle fibers are the individual cells that are bound together in fascicles. Many fascicles are bound together to make a muscle. A motor unit consists of a motor neuron and all of the muscle fibers in innervates. A skeletal muscle twitch is a mechanical response to a single action potential. During this experiment, we used an electrical stimulus to mimic the contractions of skeletal muscles. It is done in vitro to produce in vivo results.
Muscle Fiber Excitation. The events already described (calcium entry, cross-bridge cycling) occur when a muscle fiber is excited to fire an action potential. An action potential is triggered in a muscle fiber when it is depolarized due to excitation at its synapse, the neuromuscular junction.Each muscle fiber has one neuromuscular junction, receiving input from just one somatic efferent neuron.Ch binds to nicotinic receptors in a specialized region of the muscle fiber known as the motor endplate. ACh binding allows Na + ions to enter the cell, causing a depolarizing excitatory postsynaptic potential (EPSP) that is above threshold and triggers an action potential.