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6 steps in a muscle contraction
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Which pump is responsible for muscle contraction through depolarization of muscle cell membrane?
Ca2+
What organelle would be most common in a muscle cell?
Mitochondria - to produce the ATP needed for muscle contraction
What is the muscular structure?
The myofibril is the basic muscle cell, within which is the sarcomere, the basic unit of muscle contraction.
Immediately following the arrival of the stimulus at a skeletal muscle cell is a short period called the ------------ period during which the events of excitation-contraction coupling occur?
latent period
What is the process that takes place in a muscle cell to produce energy for it to work?
Contraction
The final step involved in skeletal muscle contraction is?
The muscle cell relaxes and returns passively to its resting length
What does stretching a myocardial cell cause the cell to do?
Stretching a myocardial cell allows more Ca+2 into the cell and increases the force of contraction (the longer the muscle fiber when it begins to contract, the greater the force of contraction).
Why can the contraction of the muscle tissue cause your arm to bend but the contraction of a single muscle cell would have no effect?
It doesn't have "no effect" ... it's just too feeble to be noticed.
When muscle cell demands energy to perform its work of contraction what happens to ATP?
ATP breaks down when a muscle cell demands energy to perform its work of contraction. ATP, which is a nucleoside triphosphate, stands for adenosine triphosphate.
What are the 4 stages of a muscle cell?
Tonus (relaxation), Excitation (neural stimulation, Clonus (contraction), Tetanus (prolonged contraction), return to Tonus (relaxation) Or Excitation, Excitation-Contraction Coupling, Contraction, Relaxation
What are the three stages of muscle cell contraction?
A Muscle Twitch is a single contraction of skeletal muscle. The three distinct phases are latent, contraction, and relaxation. Latent Phase: Is the interval from the stimulus application until the muscle begins to contract (shorten). Note that there is no traced activity during this phase, but there are some electrical and chemical changes taking place during this phase. Contraction Phase: This phase is when the muscle fibers shorten, the tracings will show during this phase (a) peak(s). Relaxation Phase: This phase is represented by the downward curve in your tracings, this is when the muscle is going back to its original state of relaxation and the muscle will once again lengthen
What is the repeating series of events that describe life of a cell?
cell cycle
