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What is a rhythmic contraction?
A rhythmic contraction refers to a repeated pattern of muscle contractions at regular intervals. This can occur in various muscles in the body, including the heart muscle during the cardiac cycle. Rhythmic contractions are important for fundamental physiological processes such as pumping blood or generating movement.
The repeated contractions of cardiac muscle are called?
Heartbeats are the repeated contraction of cardiac muscles.
What is a treppe?
A treppe is a gradual increase in muscle contractions following rapidly repeated stimulation. When a muscle is stimulated a second time immediately after the first , the next muscle will be higher in intensity.
A deficiency of parathyroid hormone can cause involuntary muscle contractions of a type called?
Tetany is the term for the muscle contractions that may be caused by hypoparathyroidism.
Stimulation of the patellar tendon results in a muscle contractions called what?
A reflex.
Quivering or spontaneous muscle contractions especially of the heart is called?
fibrillation
What are the differences between isometric, concentric, and eccentric muscle contractions?
Isometric muscle contractions happen when the muscle stays the same length, concentric contractions occur when the muscle shortens, and eccentric contractions occur when the muscle lengthens.
What is the ability of a muscle group to continue muscle movement over a period of time?
Muscular endurance is the ability of a muscle group to sustain repeated contractions or muscle movements over a prolonged period without getting fatigued. This type of endurance is important for activities that require prolonged, repetitive muscle contractions like running, cycling, or swimming.
Can skeletal muscle be tetanised?
Yes, because of the short refractory period of skeletal muscle (compared to cardiac muscle), skeletal muscle can be restimulated before the muscle is completely relaxed. If repeated enough times, the contractions fuse together i.e. they become tetanised.
What muscle actions would be classified as isotonic contractions?
Isotonic contractions involve muscle actions where the muscle length changes as it contracts against a constant load. There are two types: concentric contractions (shortening of the muscle during contraction) and eccentric contractions (lengthening of the muscle during contraction).
Skeletal muscle twitch differs from a tetanic contraction in that?
Skeletal muscle twitch is a single, brief contraction and relaxation cycle, whereas a tetanic contraction involves sustained, rapid repeated contractions without relaxation in between. Tetanic contractions occur when the muscle is stimulated at a high frequency, leading to a fused contraction.
How does concentric resistance training impact muscle strength and endurance?
Concentric resistance training can improve muscle strength and endurance by targeting the concentric phase of muscle contractions, which involves the shortening of muscles against resistance. This type of training helps to increase muscle force production and enhance the ability of muscles to sustain repeated contractions over time, leading to improvements in both strength and endurance.
