Activity 1: The Muscle Twitch And Latent
Activity 1 – The Muscle Twitch and Latent
1) Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Skeletal Muscle Fiber: Skeletal muscle cells that are composed of hundreds to thousands of individual cells that produce muscle tension. These fibers are what move our bodies and generate muscle tension/force that enables us to have manual dexterity.
Motor unit: consists of one motor neuron and all of the skeletal muscle fibers that it stimulates. The unit is located at the neuromusclular junction, where the axon terminal of the neuron meets, also called the motor end plate.
Skeletal Muscle Twitch: A period of excitation-contraction in which electrical pulses trigger action potentials, The twitch is the result of a mechanical response to a single action potential.
Electrical Stimulus: An isolated stimulus that sends energy through a muscle in which a response occurs. The stimulus generates movement in the muscle and causes the muscle to generate contractions.
Latent Period: The beginning stage of muscle contractions. This stage produces no muscle force, but prepares the cells for oncoming contractions by releasing chemicals to the cells.
2) What is the role of acetylcholine …show more content…
Thus, the muscle will produce more force for a longer time period if the stimulator is briefly turned off than if the stimuli were allowed to continue without interruption. Explain why this might occur. By turning the stimulator off, a period of rest is created; thus allowing the concentrations of intercellular concentrations of Lactic Acid, ADP, and Pi to decrease. With these concentrations being at a decreased level, the length of time that the muscle is able to maintain maximum tension increases. If the stimulator was not turned off for a short time, the muscle would not be allowed to reach a rest period and further fatigue would
1) Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Skeletal Muscle Fiber: Skeletal muscle cells that are composed of hundreds to thousands of individual cells that produce muscle tension. These fibers are what move our bodies and generate muscle tension/force that enables us to have manual dexterity.
Motor unit: consists of one motor neuron and all of the skeletal muscle fibers that it stimulates. The unit is located at the neuromusclular junction, where the axon terminal of the neuron meets, also called the motor end plate.
Skeletal Muscle Twitch: A period of excitation-contraction in which electrical pulses trigger action potentials, The twitch is the result of a mechanical response to a single action potential.
Electrical Stimulus: An isolated stimulus that sends energy through a muscle in which a response occurs. The stimulus generates movement in the muscle and causes the muscle to generate contractions.
Latent Period: The beginning stage of muscle contractions. This stage produces no muscle force, but prepares the cells for oncoming contractions by releasing chemicals to the cells.
2) What is the role of acetylcholine …show more content…
Thus, the muscle will produce more force for a longer time period if the stimulator is briefly turned off than if the stimuli were allowed to continue without interruption. Explain why this might occur. By turning the stimulator off, a period of rest is created; thus allowing the concentrations of intercellular concentrations of Lactic Acid, ADP, and Pi to decrease. With these concentrations being at a decreased level, the length of time that the muscle is able to maintain maximum tension increases. If the stimulator was not turned off for a short time, the muscle would not be allowed to reach a rest period and further fatigue would