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Twitch muscle fibers are used for prolonged activity and have?
____ twitch muscle fibers are used for prolonged activity and have ___ mitochodria. Slow; many
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.
How are slow oxidative fibers in skeletal muscle used during physical activity?
Slow oxidative fibers in skeletal muscle are used during physical activity to provide sustained energy for endurance activities, such as long-distance running or cycling. These fibers are efficient at using oxygen to produce energy through aerobic metabolism, allowing for prolonged muscle contractions without fatigue.
What does the mitochondria do in muscle cell?
Mitochondria in muscle cells produce energy through a process called cellular respiration, generating ATP (adenosine triphosphate) that fuels muscle contractions. This energy production enables muscle cells to sustain prolonged contractions during physical activities.
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 Drugs slow and strengthen heart muscle contractions?
Diuretics is not the right answer. It is cardiotonic.
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).
What type of fibers are present in supraspinatus and infraspinatus muscles?
The supraspinatus muscle contains mostly type I (slow-twitch) muscle fibers, which are more fatigue-resistant and used for sustained contractions. The infraspinatus muscle contains a mix of type I and type II (fast-twitch) muscle fibers, which are used for more powerful and quick contractions.
What is the significance of peak contractions in muscle training and how can they be optimized for maximum muscle growth?
Peak contractions in muscle training refer to the point in an exercise where the muscle is fully contracted, leading to increased muscle activation and growth. To optimize peak contractions for maximum muscle growth, focus on using proper form, controlling the movement, and incorporating techniques like slow repetitions, isometric holds, and drop sets. Additionally, ensuring progressive overload by gradually increasing weight and intensity will stimulate muscle growth effectively.
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.
What process involves muscle contractions that move food through the esophagus molecules?
Different types of muscle contractions
What are the differences between tonic and phasic muscle contractions in terms of their duration and intensity?
Tonic muscle contractions are sustained and steady, while phasic muscle contractions are brief and intense. Tonic contractions last longer and have a lower intensity, while phasic contractions are shorter in duration but have a higher intensity.
