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simply: Wave summation occurs when a second stimulus is applied before relaxation occurs completely.
In depth: In order for a muscle to contract electrical shock or nerve impulse must cause voltage-sensitive tubule proteins (T-tubules) of sarcoplasmic reticulum to change shape and allow Ca2+ into cytosol. Ca2+ binds to troponin (changing its shape) allowing myosin (makes thick filaments) to attach to actin ( makes thin filaments). Myosin pulls itself along actin via ATP hydrolysis, this is called a cross bridge cycle, basically shortening of muscle. Before the contraction stops, another stimulus is sent to the muscle allowing more Ca2+ into the cytosol which keeps allowing cross bridge cycle. wave summation means the contractions are added together. thus increasing the force of the second stimuli. force will increase until the muscle reaches its threshold.
What else can I help you with?
What is the primary function of wave summation?
produce smooth, continuous muscle contraction
When the frequency of stimulation of a muscle is great enough?
wave summation results and muscle twitches overlap.
What is the difference between wave summation and recruitment?
Wave summation releases more calcium and increases the force of contraction by increasing the firing rate of motor neurons (The second contraction takes place before the first is completely at rest) so each stimulation adds up. This is all within ONE MUSCLE FIBER. Recruitment is the calling up multiple MOTOR UNITS, in order to increase the force of contraction. t has a size principle (those with small diameters, the more delicate ones are called first, then the larger and so on.) There is no added calcium ions as in wave summation. They usually occur together. wave summation can cause tetanus, while recruitment cannot.
When does wave summation occurs?
Wave summation occurs when a muscle is stimulated rapidly enough that it does not have time to completely relax between stimuli, causing the contractions to combine or "summate" to produce a stronger muscle contraction. This phenomenon can occur during repetitive or sustained muscle activity, leading to increased muscle force production.
What happens to the strength of contraction during wave summation?
It increases about to about four times greater than a normal contraction for skeletal muscle.
What causes wave summation?
Wave summation occurs when a muscle undergoes rapid stimulation before it has fully relaxed, causing subsequent twitches to combine and result in a more forceful contraction. This is caused by an accumulation of calcium ions within the muscle fiber, which enhances the cross-bridge cycling process and leads to greater tension development.
What property in a wave increases wave amplitude?
Increasing the energy or intensity of the source producing the wave can increase the wave amplitude. This can be achieved by increasing the magnitude of the disturbance that creates the wave initially.
Why is a summation greater than an integral?
It's not. It depends on the method you use for summation whether summation > integral or integral > summation.
What wave summation results in stronger contractions at the same stimulus strength because the muscle doesn't have time to completely what between successive stimuli?
Relax
What Technique of protecting beaches from wave erosion?
Generally achieved by the building of periodic breakwaters along the shore, which baffles the wave action and reduces the effects of wave erosion.
Other words for addition in maths?
Sum or summation
What is process of summation?
A summation is a recap of all the highlights of a presentation.
