activity 2
Name: Cassidy Lessig
Activity 1 The Muscle Twitch and the Latent Period
1. 1. Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period 2. What .is the role of acetylcholine in a skeletal muscle contraction?
Skeletal muscle fiber-Skeletal muscle fibers are the individual cells that are bound together in fascicles. Many fascicles are bound together to make a muscle
Motor unit-A motor unit consists of a motor neuron and all of the muscle fibers in innervates.
Skeletal muscle twitch-A skeletal muscle twitch is a mechanical response to a single action potential.
Electrical stimulus- used to mimic the contractions of skeletal muscles
Latent period-Latent period is the period of time between the generation of an action potential in a muscle cell and the start of muscle contraction.
The role of acetylcholine in a skeletal muscle contraction is to bind specific receptors on the sarcolemma to open sodium channels so calcium ions can be released into the sarcoplasm
2. Describe .the process of excitation-contraction coupling in skeletal muscle fibers
The process of excitation-contraction coupling in skeletal muscle fibers is that the end plate potential triggers a series of events that results in the contraction of a muscle cell. End plate potential is caused by the events that occur at the neuromuscular junction.
3. Describe the three phases of a skeletal muscle twitch. The first phase is the latent period- this is the period of time that elapses between the generations of an action potential in a muscle cell. The second phase is the contraction phase- in this phase, the muscle fibers shorten. The third phase is the relaxation phase- in this phase, the muscle is going back to its original stae of relaxation and it will once again lengthen.
4. Does the duration of the latent period change with different stimulus voltages? How well did the results compare with your prediction?
With different
Activity 1 The Muscle Twitch and the Latent Period
1. 1. Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period 2. What .is the role of acetylcholine in a skeletal muscle contraction?
Skeletal muscle fiber-Skeletal muscle fibers are the individual cells that are bound together in fascicles. Many fascicles are bound together to make a muscle
Motor unit-A motor unit consists of a motor neuron and all of the muscle fibers in innervates.
Skeletal muscle twitch-A skeletal muscle twitch is a mechanical response to a single action potential.
Electrical stimulus- used to mimic the contractions of skeletal muscles
Latent period-Latent period is the period of time between the generation of an action potential in a muscle cell and the start of muscle contraction.
The role of acetylcholine in a skeletal muscle contraction is to bind specific receptors on the sarcolemma to open sodium channels so calcium ions can be released into the sarcoplasm
2. Describe .the process of excitation-contraction coupling in skeletal muscle fibers
The process of excitation-contraction coupling in skeletal muscle fibers is that the end plate potential triggers a series of events that results in the contraction of a muscle cell. End plate potential is caused by the events that occur at the neuromuscular junction.
3. Describe the three phases of a skeletal muscle twitch. The first phase is the latent period- this is the period of time that elapses between the generations of an action potential in a muscle cell. The second phase is the contraction phase- in this phase, the muscle fibers shorten. The third phase is the relaxation phase- in this phase, the muscle is going back to its original stae of relaxation and it will once again lengthen.
4. Does the duration of the latent period change with different stimulus voltages? How well did the results compare with your prediction?
With different