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Rarefaction occurs only in?
Rarefaction only occurs in a longitudinal wave. Rarefaction is the reduction of the density of a medium. It is the opposite of compression.
What occurs when a wave is reflected?
The wave can flip upside down
Does wave interference occurs for all types of waves?
Yes, wave interference occurs for all types of waves.
Reflection occurs when a wave does what?
It occurs when a wave which is incident on a surface changes direction.
When does reflection occurs?
When a wave hits an object with properties of not absorbing or diffusing the wave.
What is the difference between wave summation and tetanus?
in wave summation muscular fibers recieve second stimulus after a refractory period and before fiber relaxes while in tetanus the fiber receives 20-30 stimuli per second and it relax partialy.
What is the primary function of wave summation?
produce smooth, continuous muscle contraction
If a second stimulus arrives before the relaxation phase has ended a second more powerful contraction occurs this is called what?
In fact it is not treppe it is wave summation. 4th year bio med! I KNOW MY STUFF!!
What happens when summation occurs in cardiac muscle?
Basic muscle summation -an increase in the frequency with which a muscle is stimulated increases the strength of contraction. With increased stimuli to the heart if summation occurred the contractions would keep increasing.
What is meant by summation at a synapse and how can the two ways it is accomplished be described?
Summation is the method in which signal transmission between neurons occurs. Summation occurs through excitatory neurotramitters and inhibitory neurotransmitters. Excitatory produces depolarization of the postsynaptic cell. Inhibitory mitigates the effects of an excutatory neurotransmitter. For more information visit the Related Link.
When the frequency of stimulation of a muscle is great enough?
wave summation results and muscle twitches overlap.
Rarefaction occurs only in?
Rarefaction only occurs in a longitudinal wave. Rarefaction is the reduction of the density of a medium. It is the opposite of compression.
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 a second EPSP arrives at a single synapse before the effect of the first have disappeared what occurs?
temporary summation
How is wave summation achieved in vivo?
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 is a wave that occurs at the surface betwene to mediums?
transverse wave
What occurs when a wave is reflected?
The wave can flip upside down
