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Reciprocal innervation occurs when the prime mover contracts, such as the triceps in an arm extension and its antagonist -- the biceps -- relaxes. This allows the movement, say of a punch, to be ballistic rather than positional or gradual. The purpose of the antagonist is to stop the extension of the joint to avoid injury or to achieve a particular joint angle for a task, such as reaching for something.
What else can I help you with?
What is the medical term meaning delayed relaxation of a muscle after a strong contraction?
The medical term for delayed relaxation of a muscle after a strong contraction is myotonia. This condition is characterized by prolonged muscle stiffness or difficulty relaxing the muscle after it has been contracted. Myotonia can occur in conditions such as myotonic dystrophy or myotonia congenita.
Does relaxation require ATP?
No, relaxation does not require ATP. ATP is primarily used for muscle contraction. Relaxation occurs when calcium ions are actively pumped out of the muscle cell, which does not require ATP.
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 A musculotropic substance acts on what?
A musculotropic substance acts on muscle tissue. It specifically targets and affects smooth muscle cells, resulting in changes to muscle contraction and relaxation.
What are the units of contraction within a muscle fiber called?
The units of contraction within a muscle fiber are called sarcomeres. Sarcomeres are the basic functional and structural units of striated muscle tissue, composed of actin and myosin filaments. They are organized in a repeating pattern along the length of the muscle fiber, allowing for coordinated contraction and relaxation during muscle activity.
Does muscle relaxation does not require ATP?
Both muscle relaxation and muscle contraction require ATP.
What do you think the effect of breaking down acetylcholine is on muscle contraction?
Breaking down acetylcholine can lead to muscle relaxation because acetylcholine is a neurotransmitter that stimulates muscle contraction. When acetylcholine is broken down, the signal for muscle contraction is reduced, resulting in muscle relaxation.
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 muscles that are slow in contraction and relaxation?
smooth muscle
Is it true that ATP id required for muscle contraction but not for muscle relaxation?
true
What is the medical term meaning delayed relaxation of a muscle after a strong contraction?
The medical term for delayed relaxation of a muscle after a strong contraction is myotonia. This condition is characterized by prolonged muscle stiffness or difficulty relaxing the muscle after it has been contracted. Myotonia can occur in conditions such as myotonic dystrophy or myotonia congenita.
What are the two main things each muscle is capable of?
contraction and relaxation
What is effect of contraction and relaxation of the ciliary muscle?
change in shape of lens.
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 is movements of muscle?
Muscle movements happen from contraction and relaxation of the muscle cells. The movement is similar to a rubber band, however relaxation makes the muscles longer.
Does relaxation require ATP?
No, relaxation does not require ATP. ATP is primarily used for muscle contraction. Relaxation occurs when calcium ions are actively pumped out of the muscle cell, which does not require ATP.
The alternating contraction and relaxation of opposing layers of smooth muscle is referred to as?
Peristalsis
